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Here are the technical service bulletins we have for the 2020 GMC SIERRA 2500. If you have any questions, do not hesitate to Contact Us:
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 210000 TRAILER HITCHES
20190708
210000 TRAILER HITCHES
This informational bulletin provides explanation of a normal condition of a loose fitting ball receiver in the gooseneck.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353000 EQUIPMENT:ELECTRICAL
20190731
353000 EQUIPMENT:ELECTRICAL
This Preliminary information communicates AFM / DFM usage Information. providing additional information on the AFM and DFM systems
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20190624
070000 FUEL SYSTEM, GASOLINE
This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 200000 WHEELS
20190617
200000 WHEELS
This informational bulletin provides information to clarify installation requirements when installing Accessory wheels on 2020 Chevrolet Silverado HD and 2020 GMC Sierra HD.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190625
350000 EQUIPMENT
This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20190627
060000 ENGINE (PWS)
This informational bulletin provides information on higher than expected oil consumption.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190627
350000 EQUIPMENT
This informational bulletin provides information on higher than expected oil consumption.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20190627
060000 ENGINE (PWS)
This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190624
060000 ENGINE AND ENGINE COOLING
This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20190801
060000 ENGINE (PWS)
This Preliminary information communicates to the dealer technician the procedures for DTC P11CC, P226D, P249E, P249D, P20EE or P226D while engineering is investigating.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20190801
110000 ELECTRICAL SYSTEM
This Preliminary information communicates to the dealer technician the procedures for DTC P11CC, P226D, P249E, P249D, P20EE or P226D while engineering is investigating.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 080000 FUEL SYSTEM, DIESEL
20190626
080000 FUEL SYSTEM, DIESEL
This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20190626
070000 FUEL SYSTEM, GASOLINE
This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20190626
356000 EQUIPMENT ADAPTIVE
This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20190626
110000 ELECTRICAL SYSTEM
This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20190626
010000 STEERING
This technical bulletin provides a procedure to flush and bleed power steering system to correct a power steering noise or fluid leak concern that is caused during extremely low temperatures.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20190624
070000 FUEL SYSTEM, GASOLINE
This Bulletin provides information to correct a customer concern of a siren or whine noise from the in-tank fuel pump at temperatures below -6C or 20F, accompanied by start and stall, no start, loss of power and MIL illuminated. Technicians
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20190624
060000 ENGINE (PWS)
This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190610
350000 EQUIPMENT
This New Model Features Bulletin provides General Information and other Topics to help the Service Personnel become familiar with features specific to the new Chevrolet Silverado and GMC Sierra 2500HD-3500HD pickup trucks.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20190611
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This bulletin explains the labor operation numbers used for submitting warranty claims for module reprogramming and not when replacing a module.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20190611
110000 ELECTRICAL SYSTEM
This bulletin explains the labor operation numbers used for submitting warranty claims for module reprogramming and not when replacing a module.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20190626
356000 EQUIPMENT ADAPTIVE
The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190626
350000 EQUIPMENT
The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20190625
356000 EQUIPMENT ADAPTIVE
This informational bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190625
350000 EQUIPMENT
This informational bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190819
350000 EQUIPMENT
This bulleting provides Wiring, Terminal and Connector Repair Information including how to determine the Service Part Number in eSI and how to locate the part(s) in the EPC.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20190807
356000 EQUIPMENT ADAPTIVE
This Preliminary information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitte
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190807
350000 EQUIPMENT
This Preliminary information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitte
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190726
350000 EQUIPMENT
This informational bulletin provides process information for the (GWM) and (WPC) parts return program.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 260000 FORWARD COLLISION AVOIDANCE
20190905
260000 FORWARD COLLISION AVOIDANCE
This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190905
060000 ENGINE AND ENGINE COOLING
This Preliminary Information communication advises the technician with a tip when the vehicle stops running after it has been idling for 2.5 hours. This is normal operation of the vehicle built with regular production code BTM and without R
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190905
060000 ENGINE AND ENGINE COOLING
This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program. Dealer will need to contact General Motors Product Quality Center for further assistance.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190823
350000 EQUIPMENT
This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353000 EQUIPMENT:ELECTRICAL
20190820
353000 EQUIPMENT:ELECTRICAL
This informational bulletin provides information on Loss of Phone Pairing or Favorites, Last Setting of Volume, Station, App, and Audio Settings Change When Vehicle Shuts Down in Demo Mode and that this is considered a normal characteristic
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190813
060000 ENGINE AND ENGINE COOLING
This informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190821
060000 ENGINE AND ENGINE COOLING
This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 200000 WHEELS
20190829
200000 WHEELS
This informational bulletin provides information on Wheel Balancer Mounting Instructions.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190909
060000 ENGINE AND ENGINE COOLING
This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program and crankshaft has been placed on part ordering restriction. Dealer will need to contact General Mot
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 046300 SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR
20190909
046300 SERVICE BRAKES, AIR:ANTILOCK:WHEEL SPEED SENSOR
This Preliminary information communication provides information to the dealer about vehicles with the ABS light or Service Stability Message displayed with C050A or C0504 DTC's set. Dealer may find manufacturing debris on the wheel speed se
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 162000 STRUCTURE:BODY
20190913
162000 STRUCTURE:BODY
This Preliminary information communicates the need for proper documentation when submitting a Field Product Report on paint issues with the new 2020 HD Silverado and Sierra.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20190920
110000 ELECTRICAL SYSTEM
This Preliminary information communicates information for the dealer to reprogram the IPC to correct the Off-Road Mode not being able to be selected using the Driver Mode Control Switch.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20190923
100000 POWER TRAIN
This Preliminary information communicates to the dealer technician that the 10L60, 10L80 and the 10L90 transmissions have been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
20190812
103000 POWER TRAIN:AUTOMATIC TRANSMISSION
This informational bulletin provides information on Some vehicles may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20190611
100000 POWER TRAIN
This Preliminary information communicates to the dealer technician that the 10L1000 transmission have been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission assembly.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20190925
110000 ELECTRICAL SYSTEM
This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical s
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20190927
110000 ELECTRICAL SYSTEM
This Preliminary information communicates to the dealer technician to check for any new ECM calibration updates for DTCs P129F P16F3 P20EE P20FF P226D P249D P249E P11CC and / or P11D5 set.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190626
060000 ENGINE AND ENGINE COOLING
This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program. Dealer will need to contact General Motors Product Quality Center for further assistance.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190930
060000 ENGINE AND ENGINE COOLING
This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program and crankshaft has been placed on part ordering restriction. Dealer will need to contact General Mot
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 284100 BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
20190719
284100 BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
This Preliminary information communication provides information to the technician on installing Regular Production Option Code UVC Rearview Camera. Technician will need to reference the latest version of General Motors Up-fitter Integratio
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20190814
070000 FUEL SYSTEM, GASOLINE
This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190813
350000 EQUIPMENT
This technical bulletin provides repair information to correct a customer concern of Static Crackling Noise Using Bluetooth Microphone.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190823
060000 ENGINE AND ENGINE COOLING
This bulletin provides additional information on how to graph a cylinder misfire and a possible diagnostic cause.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20190805
010000 STEERING
This technical bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353000 EQUIPMENT:ELECTRICAL
20190903
353000 EQUIPMENT:ELECTRICAL
This Preliminary information communicates to the dealer technician the procedures for DTC P11CC, P11D5, P226D, P249E, P249D, P20EE or P226D while engineering is investigating.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 063200 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
20190826
063200 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
This informational bulletin provides a procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20190815
060000 ENGINE AND ENGINE COOLING
This informational bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20191002
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191001
060000 ENGINE AND ENGINE COOLING
This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191014
060000 ENGINE AND ENGINE COOLING
This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20191009
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin provides information on key code security and information on GM key code look up applications.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200228
356000 EQUIPMENT ADAPTIVE
This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200228
350000 EQUIPMENT
This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 162000 STRUCTURE:BODY
20200228
162000 STRUCTURE:BODY
This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 080000 FUEL SYSTEM, DIESEL
20191017
080000 FUEL SYSTEM, DIESEL
This informational bulletin explains how to identify possible DEF contamination.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20191021
010000 STEERING
This technical bulletin provides repair information to correct a customer concern of steering wheel oscillation, vibration, shake 50-80 mph.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20191016
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin provides information for dealers how to submit a product information report (PIR) (Canada Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200121
350000 EQUIPMENT
This Warranty Administration bulletin provides information on customer vehicles concern results in a manufacturer repurchase from the customer, GM depends on the dealership to host and administer the repurchase closing and intake of the ret
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 050000 PARKING BRAKE
20191015
050000 PARKING BRAKE
This Preliminary information communicates how to repair a loose shift cable bracket.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200219
060000 ENGINE (PWS)
This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program and crankshaft has been placed on part ordering restriction. Dealer will need to contact General Mot
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200219
350000 EQUIPMENT
This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program and crankshaft has been placed on part ordering restriction. Dealer will need to contact General Mot
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20191017
110000 ELECTRICAL SYSTEM
This Preliminary information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitte
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191017
060000 ENGINE AND ENGINE COOLING
This Preliminary Information communication provides information to the technician that some vehicle may have an ?Exhaust Fluid Quality Poor? on the Driver Information Center or a diesel exhaust fluid warning lamp on or other exhaust fluid q
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20191002
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin provides information on comebacks prevention information and using customer concern verification sheets (CCVS).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 030000 SERVICE BRAKES, HYDRAULIC
20200128
030000 SERVICE BRAKES, HYDRAULIC
This technical bulletin provides a procedure to replace the front and rear brake pads if the brakes are squealing.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20200129
010000 STEERING
This technical bulletin provides repair information to correct a customer concern of Intermittent "Service Steering Column Lock" message displayed with U0155 Set.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 280000 BACK OVER PREVENTION
20200129
280000 BACK OVER PREVENTION
This technical bulletin provides a procedure to re-torque the leaf spring u bolts to correct a condition of Clunking Noise from Rear of Vehicle (Re-torque Leaf Spring Bolts).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 200000 WHEELS
20200129
200000 WHEELS
This technical bulletin provides a procedure to re-torque the leaf spring u bolts to correct a condition of Clunking Noise from Rear of Vehicle (Re-torque Leaf Spring Bolts).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200113
350000 EQUIPMENT
This bulletin provides information regarding Part Restriction and Ordering Process Information for OnStar® Vehicle Communication Interface Modules (VCIM) (GMNA Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200113
110000 ELECTRICAL SYSTEM
This bulletin provides information regarding Part Restriction and Ordering Process Information for OnStar® Vehicle Communication Interface Modules (VCIM) (GMNA Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20191014
010000 STEERING
This Preliminary information communicates information on a hydrauilc rush type noise from the power steering gear. This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made. The noise is
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20191025
070000 FUEL SYSTEM, GASOLINE
This Preliminary Information communication provides information to the technician about vehicles that may have a bump feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
20191014
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
This informational bulletin provides information on Clean Exhaust Filter See Owners Manual Now or Cleaning Exhaust Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191030
350000 EQUIPMENT
This informational bulletin provides technicians and dealership personnel with spray-in bed liner general information and repair procedures.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 260000 FORWARD COLLISION AVOIDANCE
20191003
260000 FORWARD COLLISION AVOIDANCE
This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20191010
100000 POWER TRAIN
This Preliminary information communicates to the dealer technician that the 10L1000 transmission have been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission assembly.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190918
350000 EQUIPMENT
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191001
060000 ENGINE AND ENGINE COOLING
N192266750 - Service Update. On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster may incorrectly display the message ?DEF Low? when a diese
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191008
060000 ENGINE AND ENGINE COOLING
N192266751 - Service Update (9 VINs moved from N192266750 due to different procedure). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 103000 POWER TRAIN:AUTOMATIC TRANSMISSION
20190930
103000 POWER TRAIN:AUTOMATIC TRANSMISSION
This technical bulletin provides the tech with a procedure to check the t-case for loose fasteners and to re-torque if the cause of the concern.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191009
060000 ENGINE AND ENGINE COOLING
This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353000 EQUIPMENT:ELECTRICAL
20191010
353000 EQUIPMENT:ELECTRICAL
This informational bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 160000 STRUCTURE
20200217
160000 STRUCTURE
This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 080000 FUEL SYSTEM, DIESEL
20200214
080000 FUEL SYSTEM, DIESEL
Service Update - Certain vehicles may have a condition where the thermal cover may accelerate corrosion of the low pressure diesel hydrocarbon injector. Dealers are to remove the low pressure diesel hydrocarbon injector thermal cover.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20200214
070000 FUEL SYSTEM, GASOLINE
Service Update - Certain vehicles may have a condition where the thermal cover may accelerate corrosion of the low pressure diesel hydrocarbon injector. Dealers are to remove the low pressure diesel hydrocarbon injector thermal cover.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 030000 SERVICE BRAKES, HYDRAULIC
20200214
030000 SERVICE BRAKES, HYDRAULIC
Service Update - Certain vehicles may have a condition where the thermal cover may accelerate corrosion of the low pressure diesel hydrocarbon injector. Dealers are to remove the low pressure diesel hydrocarbon injector thermal cover.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20191007
110000 ELECTRICAL SYSTEM
This technical provides a procedure to locate, disconnect and re-connect the TCM electrical connector if found the cause of the customers concerns.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353600 EQUIPMENT:AIR CONDITIONER
20191016
353600 EQUIPMENT:AIR CONDITIONER
This informational bulletin informs the technician of a possible low A/C charge in a low milage vehicle from the factory.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20191014
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin provides tips for showing a way to confirm if its a mechanical engine issue or not.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 117000 DIGITAL INSTRUMENT PANEL
20191202
117000 DIGITAL INSTRUMENT PANEL
N192266750-01 - Service Update (Revised Warranty Information and Service Procedure). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster ma
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191202
060000 ENGINE AND ENGINE COOLING
N192266750-01 - Service Update (Revised Warranty Information and Service Procedure). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster ma
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 162000 STRUCTURE:BODY
20191205
162000 STRUCTURE:BODY
N192259800 - Customer Satisfaction Program - Certain 2020 vehicles vehicles, equipped with the 6.6L diesel engine (RPO L5P), may have a condition in which the adhesive attaching the heat shield to the air inlet panel may lose adhesion. Dea
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191205
060000 ENGINE AND ENGINE COOLING
N192259800 - Customer Satisfaction Program - Certain 2020 vehicles vehicles, equipped with the 6.6L diesel engine (RPO L5P), may have a condition in which the adhesive attaching the heat shield to the air inlet panel may lose adhesion. Dea
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191206
060000 ENGINE AND ENGINE COOLING
N192277930 - Service Update - Certain 2020 model year Chevrolet Silverado and GMC Sierra vehicles may, after several years of use, fracture at the yoke-to-tube friction weld joint under torsional load. If the prop shaft fractures, the vehi
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200108
350000 EQUIPMENT
This technical bulletin provides the tech with a procedure to check the t-case for loose fasteners and to re-torque if the cause of the concern.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 104000 POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
20200108
104000 POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
This technical bulletin provides the tech with a procedure to check the t-case for loose fasteners and to re-torque if the cause of the concern.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200114
356000 EQUIPMENT ADAPTIVE
This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20200114
010000 STEERING
This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200226
060000 ENGINE (PWS)
This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 080000 FUEL SYSTEM, DIESEL
20200226
080000 FUEL SYSTEM, DIESEL
This informational bulletin explains the difference in AFM and DFM engines and what is and is not activated during this occurrence.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200226
356000 EQUIPMENT ADAPTIVE
This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 173100 LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
20200226
173100 LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 280000 BACK OVER PREVENTION
20200226
280000 BACK OVER PREVENTION
This informational bulletin advises the technician to not replace the TMAP sensor, clean it using air or harsh chemicals but allow time for the sensor to thaw.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200228
350000 EQUIPMENT
This technical bulletin provides repair information to correct a customer concern of endgate will not auto open or auto close after accessory tonneau cover installation, and/or poor fit of tonneau cover to endgate.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200128
110000 ELECTRICAL SYSTEM
Service Update Bulletin - Certain 2020 model year Chevrolet Silverado and GMC Sierra vehicles equipped with a 2.7L Engine (RPO ENL), Engine Control Disable Start/Stop (RPO L3B), and a 3.5? Driver?s Information Center Display (RPO UDC), may
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200214
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This warranty administration bulletin provide policy information to cover GMs policy on performing GM covered vehicle services and maintenance on vehicles originating/sold in Canada.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200224
356000 EQUIPMENT ADAPTIVE
This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200224
350000 EQUIPMENT
This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20200224
010000 STEERING
This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200225
100000 POWER TRAIN
This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200207
060000 ENGINE (PWS)
This Bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200207
350000 EQUIPMENT
This Bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200117
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 161000 STRUCTURE:FRAME AND MEMBERS
20200108
161000 STRUCTURE:FRAME AND MEMBERS
This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 132000 VISIBILITY:GLASS, SIDE/REAR
20200108
132000 VISIBILITY:GLASS, SIDE/REAR
This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200128
060000 ENGINE (PWS)
This diagnostic tip provides a procedure to aid in performing a diagnostic test to verify if the camshaft alignment pin has been sheared away to correct a crank/No Start condition.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20191002
060000 ENGINE AND ENGINE COOLING
This Preliminary information communicates to the dealer technician to refer to Service Update N192266750.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 063100 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
20200123
063100 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
This informational bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 160000 STRUCTURE
20191210
160000 STRUCTURE
This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200129
350000 EQUIPMENT
This informational bulletin provides information on GM Accessories ? Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200214
356000 EQUIPMENT ADAPTIVE
This Warranty Administration bulletin provides information on Essential Tools that include Consumable Parts (U.S. Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200214
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This Warranty Administration bulletin provides information on Essential Tools that include Consumable Parts (U.S. Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 133000 VISIBILITY:POWER WINDOW DEVICES AND CONTROLS
20200131
133000 VISIBILITY:POWER WINDOW DEVICES AND CONTROLS
This SKU is a Power Window Regulator and Motor Assembly. The customer communication requested return of unsold inventory to inspect the software. The software may be too sensitive to the position of a locating magnet in the assembly causi
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200131
110000 ELECTRICAL SYSTEM
This SKU is a Power Window Regulator and Motor Assembly. The customer communication requested return of unsold inventory to inspect the software. The software may be too sensitive to the position of a locating magnet in the assembly causi
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200214
350000 EQUIPMENT
This informational bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 200000 WHEELS
20200214
200000 WHEELS
This informational bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200226
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This warranty administration bulletin provides information on the tires supplied with a new vehicle are covered by General Motors against defects in material or workmanship under the Bumper-to-Bumper New Vehicle Limited Warranty.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 190000 TIRES
20200226
190000 TIRES
This warranty administration bulletin provides information on the tires supplied with a new vehicle are covered by General Motors against defects in material or workmanship under the Bumper-to-Bumper New Vehicle Limited Warranty.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200213
110000 ELECTRICAL SYSTEM
This engineering information (EI) is requesting information from the field to perform the check list provided and contact the engineer in regards to Instrument Panel Cluster (IPC) Gages at Zero, Multiple Warning Lights On, No Chimes and/or
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200102
356000 EQUIPMENT ADAPTIVE
This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200102
350000 EQUIPMENT
This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 073000 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM
20200102
073000 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM
This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200228
060000 ENGINE (PWS)
This informational bulletin explains Unscheduled Supplemental Services (including Flushing Services and Additives) and the Proper use of GM Simplified Maintenance Schedules.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200228
356000 EQUIPMENT ADAPTIVE
This informational bulletin explains Unscheduled Supplemental Services (including Flushing Services and Additives) and the Proper use of GM Simplified Maintenance Schedules.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200228
350000 EQUIPMENT
This informational bulletin explains Unscheduled Supplemental Services (including Flushing Services and Additives) and the Proper use of GM Simplified Maintenance Schedules.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200227
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20191125
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191125
350000 EQUIPMENT
This informational bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20191029
100000 POWER TRAIN
This informational bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operations.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20191126
356000 EQUIPMENT ADAPTIVE
This informational bulletin provides information on key code security rules and information on GM keycode look-up applications.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191126
350000 EQUIPMENT
This informational bulletin provides information on key code security rules and information on GM keycode look-up applications.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191118
350000 EQUIPMENT
This engineering informational bulletin is requesting information on a issue that is caused by loose ground connection at G110 or G114 that results in a repair.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20191121
356000 EQUIPMENT ADAPTIVE
This technical bulletin provides repair information to correct a customer concern of Phone Ringer Volume Turned Down or Too Quiet.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191121
350000 EQUIPMENT
This technical bulletin provides repair information to correct a customer concern of Phone Ringer Volume Turned Down or Too Quiet.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 118000 ELECTRICAL SYSTEM: SOFTWARE
20191206
118000 ELECTRICAL SYSTEM: SOFTWARE
This Preliminary information communicates to dealer technicians there is a software anomaly not allowing the air filter life to be reset.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 030000 BRAKES (PWS)
20191209
030000 BRAKES (PWS)
This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the calipe
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20191220
070000 FUEL SYSTEM, GASOLINE
This Preliminary information communicates to dealer technicians to check for open field actions or ECM updates for fuel gauge concerns or DTCs P24B0 or P0461.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191210
350000 EQUIPMENT
This Technical bulletin provides a service procedure for dealers/technicians on installation of Radio Software Version U148 Over-the-Air Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200117
100000 POWER TRAIN
This Preliminary Information communication provides information and definitions to the technician about vehicles that have fishbite, chuggle, misfire, AFM disturbances or torque converter shudder/vibration concerns. Technician are advised t
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20200110
060000 ENGINE AND ENGINE COOLING
This Preliminary information communicates to the dealer additional information on checking for the engne crankcase being overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminnants and adjust
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200117
350000 EQUIPMENT
This Preliminary Information communication provides information to the technician how to repair vehicles that Instrument Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection droppe
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200117
110000 ELECTRICAL SYSTEM
This Preliminary Information communication provides information to the technician how to repair vehicles that Instrument Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection droppe
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200117
110000 ELECTRICAL SYSTEM
This Preliminary information communicates an issues with a SES MIL and DTC P1005 and to replace the fuel pump driver control module with an updated part number.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20200117
070000 FUEL SYSTEM, GASOLINE
This Preliminary information communicates an issues with a SES MIL and DTC P1005 and to replace the fuel pump driver control module with an updated part number.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200123
350000 EQUIPMENT
This Preliminary Information communication advises the technician that the Radio or Tuner, radio controls, Integrated Center Stack, HUD's, IPC's, and radio displays are placed on restriction through the General Motors Technical Assistance C
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200123
110000 ELECTRICAL SYSTEM
This Preliminary Information communication advises the technician that the Radio or Tuner, radio controls, Integrated Center Stack, HUD's, IPC's, and radio displays are placed on restriction through the General Motors Technical Assistance C
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200129
100000 POWER TRAIN
This Preliminary information communicates to the dealer a condition with the throttle body that may illuminate the service engine soon light, cause the engine to run rough and/or display reduced engine power message. Dealers are instructed
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 270000 LANE DEPARTURE
20191112
270000 LANE DEPARTURE
This Preliminary Information communication provides information to the technician about vehicles that show a "Take Steering" message on the Driver Information Center along with a warning chime/alert. Dealer should be advised the purpose of
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 120000 LIGHTING (PWS)
20191112
120000 LIGHTING (PWS)
This informational bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Replacement Guidelines.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20191112
356000 EQUIPMENT ADAPTIVE
This informational bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Replacement Guidelines.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191112
350000 EQUIPMENT
This informational bulletin provides information for dealers/technicians on Exterior Lamp Condensation and Replacement Guidelines.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200430
356000 EQUIPMENT ADAPTIVE
This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before sold (prepping) to the customer.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200430
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before sold (prepping) to the customer.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200414
356000 EQUIPMENT ADAPTIVE
This preliminary informational bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 162000 STRUCTURE:BODY
20200414
162000 STRUCTURE:BODY
This preliminary informational bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200324
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards on a Service 4WD message being visible the driver information center (DIC).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20200417
060000 ENGINE AND ENGINE COOLING
This Preliminary information communicates the possibility of dtc P12A6 with the possibility of a crank no start or extended crank concern.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200429
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 190000 TIRES
20200429
190000 TIRES
This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 210000 TRAILER HITCHES
20200325
210000 TRAILER HITCHES
This engineering information (EI) is requesting information from technicians to perform the checklist provided and contact the engineer listed in regards to a Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses B
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200427
110000 ELECTRICAL SYSTEM
This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is +/
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20200427
060000 ENGINE AND ENGINE COOLING
This Preliminary information communicates the possibility of dtc P12A6 with the possibility of a crank no start or extended crank concern.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 200000 WHEELS
20200508
200000 WHEELS
Customer Satisfaction Program - Vehicles may have been built with 3500 series single rear wheel leaf springs. In service, if a single leaf spring were to be replaced, a 2500 series spring could be installed which would cause the vehicle to
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 020000 SUSPENSION
20200508
020000 SUSPENSION
Customer Satisfaction Program - Vehicles may have been built with 3500 series single rear wheel leaf springs. In service, if a single leaf spring were to be replaced, a 2500 series spring could be installed which would cause the vehicle to
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200511
350000 EQUIPMENT
Customer Satisfaction Program - Certain 2020 Chevrolet Silverado HD and GMC Sierra HD vehicles were intended to include a high idle feature, (RPO UF3). Equipment not included on the vehicle is required for the ?high idle? feature to functi
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200514
100000 POWER TRAIN
Service Update - Certain vehicles may have a condition where the transmission enters a neutral state when the internal range sensor (IRS) fault is active. Dealers are to reprogram the transmission control module.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 281000 BACK OVER PREVENTION: BACK-UP ALARM
20200519
281000 BACK OVER PREVENTION: BACK-UP ALARM
Customer Service Program - Certain vehicles may not have the backup alarm which should have been included the dealer kit. Dealers are to provide the missing backup alarm to the customer.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 080000 FUEL SYSTEM, DIESEL
20200521
080000 FUEL SYSTEM, DIESEL
Service Update - In some vehicles, equipped with diesel engines, the Diesel Exhaust Fluid (DEF) system may not immediately reactivate, as it should, after the vehicle?s control system finds that a DEF heater fault is no longer present. In
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
20200521
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
Service Update - In some vehicles, equipped with diesel engines, the Diesel Exhaust Fluid (DEF) system may not immediately reactivate, as it should, after the vehicle?s control system finds that a DEF heater fault is no longer present. In
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 061200 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
20200521
061200 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
Service Update - In some vehicles, equipped with diesel engines, the Diesel Exhaust Fluid (DEF) system may not immediately reactivate, as it should, after the vehicle?s control system finds that a DEF heater fault is no longer present. In
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200430
110000 ELECTRICAL SYSTEM
This Preliminary information communicates diagnostic tips when trying to root cause a SES MIL with DTC's B2B0D and B2B0E. Main cause is aftermarket electrical devices spliced into the ignition main fuses.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200428
356000 EQUIPMENT ADAPTIVE
This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200428
350000 EQUIPMENT
This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200527
060000 ENGINE (PWS)
This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200512
110000 ELECTRICAL SYSTEM
This engineering information (EI) is requesting information from technicians to perform the checklist provided and contact the engineer listed in regards to Shift to Park Message on Drivers Information Center (DIC) (ONLY On Push Button Igni
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200512
110000 ELECTRICAL SYSTEM
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Shift to Park Message on Drivers Information Center (DIC) (ONLY On Push Button Ign
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200526
110000 ELECTRICAL SYSTEM
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Shift to Park Message on Drivers Information Center (DIC) (ONLY On Push Button Ign
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200303
060000 ENGINE (PWS)
This Preliminary information communicates to the dealer technicians a warm engine knock noise has no short or long term effects on the engine. Do not attempt repairs for this noise.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200303
110000 ELECTRICAL SYSTEM
This Preliminary information communicates to the dealer technicians a warm engine knock noise has no short or long term effects on the engine. Do not attempt repairs for this noise.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200303
060000 ENGINE (PWS)
This Preliminary information communicates to the technician a service Diagnostic / Repair tip to avoid causing the crankshaft sprocket to disengage from the crankshaft during crankshaft balancer removal.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200309
350000 EQUIPMENT
This Preliminary information communicates how the HVAC setting operates during a remote vehicle start.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 130000 VISIBILITY
20200309
130000 VISIBILITY
This Preliminary information communicates how the HVAC setting operates during a remote vehicle start.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20191101
060000 ENGINE (PWS)
N192273400 - Service Update. Certain LD vehicles may have a condition in which the right-hand side, positive crankcase ventilation (PCV) tube may not be fully seated (loose), allowing unrestricted blow-by gases to release to the atmosphere.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20191101
350000 EQUIPMENT
N192273400 - Service Update. Certain LD vehicles may have a condition in which the right-hand side, positive crankcase ventilation (PCV) tube may not be fully seated (loose), allowing unrestricted blow-by gases to release to the atmosphere.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 070000 FUEL SYSTEM, GASOLINE
20191101
070000 FUEL SYSTEM, GASOLINE
N192273400 - Service Update. Certain LD vehicles may have a condition in which the right-hand side, positive crankcase ventilation (PCV) tube may not be fully seated (loose), allowing unrestricted blow-by gases to release to the atmosphere.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 118000 ELECTRICAL SYSTEM: SOFTWARE
20191101
118000 ELECTRICAL SYSTEM: SOFTWARE
N192279900 - Service Update. On certain vehicles equipped with an active hydraulic assist gear (RPO NV8), the driver may experience a steering wheel vibration while driving typically at speeds from 50 mph (80 km) to 80 mph (130 km). Deale
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 010000 STEERING
20191101
010000 STEERING
N192279900 - Service Update. On certain vehicles equipped with an active hydraulic assist gear (RPO NV8), the driver may experience a steering wheel vibration while driving typically at speeds from 50 mph (80 km) to 80 mph (130 km). Deale
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 117000 DIGITAL INSTRUMENT PANEL
20200506
117000 DIGITAL INSTRUMENT PANEL
This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200506
350000 EQUIPMENT
This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200527
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This Preliminary information communicates information on how dealers can contact the supplier for Associated Accessories offered through GM.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200529
110000 ELECTRICAL SYSTEM
This Preliminary information communicates to the dealer an issue where a module configuration function is missing from GDS2 scan tool. Dealer is instructed to manually build the vehicle in GDS2 and perform the function until software update
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200428
356000 EQUIPMENT ADAPTIVE
This informational bulletin is advising dealers to replace the grilles due to rust.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 160000 STRUCTURE
20200428
160000 STRUCTURE
This informational bulletin is advising dealers to replace the grilles due to rust.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200420
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Service 4WD message being visible on the driver information center (DIC).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 104000 POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
20200420
104000 POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Service 4WD message being visible on the driver information center (DIC).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 117000 DIGITAL INSTRUMENT PANEL
20200527
117000 DIGITAL INSTRUMENT PANEL
This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200527
350000 EQUIPMENT
This informational bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 020000 SUSPENSION
20200309
020000 SUSPENSION
This Preliminary Information communication provides information to the technician with the steps to diagnosis and repair vehicles with various handling, vehicle dynamics concerns, noises from the suspension or underbody, or issues related t
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 192000 TIRES:SIDEWALL
20200309
192000 TIRES:SIDEWALL
This Preliminary Information communication provides information to the technician about vehicles with tire sidewall irregularities. This is a visual condition that will not affect durability, reliability or performance of the tires. Dealer
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 190000 TIRES
20200309
190000 TIRES
This Preliminary Information communication provides information to the technician about vehicles with tire sidewall irregularities. This is a visual condition that will not affect durability, reliability or performance of the tires. Dealer
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200317
110000 ELECTRICAL SYSTEM
This Preliminary information communicates that there is software update available for the TCCM to correct a software anomaly.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200317
110000 ELECTRICAL SYSTEM
This Preliminary information communicates that there is software update available for the TCCM to correct a software anomaly.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 031100 SERVICE BRAKES, ELECTRIC
20200320
031100 SERVICE BRAKES, ELECTRIC
This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200320
110000 ELECTRICAL SYSTEM
This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200508
110000 ELECTRICAL SYSTEM
This Preliminary Information communication advises the technician that the customer may experience a 2-3 slip or flare after the vehicle has been sitting for a period of time. Technician can update the Transmission Control Module if working
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200508
100000 POWER TRAIN
This Preliminary Information communication advises the technician that the customer may experience a 2-3 slip or flare after the vehicle has been sitting for a period of time. Technician can update the Transmission Control Module if working
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200508
100000 POWER TRAIN
This Preliminary information communicates diagnostic tips on finding root cause of a hoot noise. If the technician confirms the hoot noise is only present while the torque converter clutch is applying the technician should advise the custom
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 199000 TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
20200513
199000 TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
This Preliminary Information communication provides information to the technician that some owners of Heavy Duty Trucks and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" w
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200513
110000 ELECTRICAL SYSTEM
This Preliminary information communicates Some customers may comment that the SES lamp is illuminated or was Illuminated and turned off. During inspection Technician may notice DTC P1682 (Ignition 1 Switch Circuit 2) active or stored in his
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200513
110000 ELECTRICAL SYSTEM
This Preliminary information communicates to the dealer an issue where a module configuration function is missing from GDS2 scan tool. Dealer is instructed to manually buid the vehicle in GDS2 and perform the function until software update
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200515
350000 EQUIPMENT
This Preliminary information communicates an XM service concern of no audio at startup until a channel change and directs to contact XM for direct support.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200507
350000 EQUIPMENT
This informational bulletin provides the dealership with how to prep a vehicle for delivery to the customer to aid in higher CSi scores.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200528
060000 ENGINE (PWS)
This information bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200313
110000 ELECTRICAL SYSTEM
This informational bulletin provides information for dealers/technicians on Accessory Rear Seat Infotainment (RSI) Shuts Off, Coinciding with Closing of Door or Liftgate.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200302
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This warranty administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200518
350000 EQUIPMENT
This Technical bulletin provides a service procedure for dealers/technicians on installation of Radio Software Version U148 Over-the-Air Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 073200 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
20200505
073200 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
This informational bulletin explains to the tech on how to order a new fuel injector by matching the part number on the part and ordering it from the EPC.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 030000 BRAKES (PWS)
20200521
030000 BRAKES (PWS)
This technical bulletin provides a procedure to replace the front and rear brake pads if the brakes are squealing.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 284000 BACK OVER PREVENTION: CAMERA SYSTEM
20200518
284000 BACK OVER PREVENTION: CAMERA SYSTEM
This informational bulletin provides information for dealers/technicians on Rear Camera Gridlines Incorrect, Misaligned, Offset, Incorrect Camera View after Replacing the Tailgate Handle or Entire Tailgate.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20200504
060000 ENGINE AND ENGINE COOLING
This informational bulletin advises the technician to not replace the TMAP sensor, clean it using air or harsh chemicals but allow time for the sensor to thaw.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200504
110000 ELECTRICAL SYSTEM
This informational bulletin provides a way for the technician to identify if the ECM has been modified.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20200504
060000 ENGINE AND ENGINE COOLING
This informational bulletin provides a way for the technician to identify if the ECM has been modified.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 118000 ELECTRICAL SYSTEM: SOFTWARE
20200505
118000 ELECTRICAL SYSTEM: SOFTWARE
This informational bulletin provides information for dealers/technicians on Glow Plug Control Module Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 118000 ELECTRICAL SYSTEM: SOFTWARE
20200324
118000 ELECTRICAL SYSTEM: SOFTWARE
This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20200324
356000 EQUIPMENT ADAPTIVE
This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 100000 POWER TRAIN
20200317
100000 POWER TRAIN
This technical bulletin provides a procedure to replace the transmission shifter control if found the cause of the condition.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 162800 STRUCTURE:BODY:HOOD
20200304
162800 STRUCTURE:BODY:HOOD
This technical bulletin provides repair information to correct a customer concern of hearing a wind whistle noise from front of vehicle while driving.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 173100 LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
20200318
173100 LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200318
110000 ELECTRICAL SYSTEM
This technical bulletin provides repair information to correct a customer concern of the pickup box power endgate may not open on initial press, or may not open at all.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200303
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This technical bulletin provides a procedure to clear the codes and test the Tcase if found that the customer has tried to shift the t-case from 4lo to Hi gears while driving.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200306
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This technical bulletin provides repair information to correct a customer concern of the pickup box endgate will not fully close by itself.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200320
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This informational bulletin provides information on interior cleaning products and what is offered to clean the interiors of GM vehicles.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 160000 STRUCTURE
20200406
160000 STRUCTURE
This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200420
350000 EQUIPMENT
This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200420
110000 ELECTRICAL SYSTEM
This Technical bulletin provides service procedure information for dealers/technicians on Radio Software Version V135116 Over-the-Air Update.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200420
350000 EQUIPMENT
This technical bulletin provides repair information to correct a customer concern of hearing a rattle noise from driver or passenger seat belt.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 150000 SEAT BELTS
20200420
150000 SEAT BELTS
This technical bulletin provides repair information to correct a customer concern of hearing a rattle noise from driver or passenger seat belt.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200407
060000 ENGINE (PWS)
This informational bulletin explains why more DEF is being used in diesel engines due to new emission standards.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200407
110000 ELECTRICAL SYSTEM
This informational bulletin explains why more DEF is being used in diesel engines due to new emission standards.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE (PWS)
20200407
060000 ENGINE (PWS)
This technical bulletin provides a procedure to check the oil level for correct reading and oil pressure switch is in working order.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200407
110000 ELECTRICAL SYSTEM
This technical bulletin provides a procedure to check the oil level for correct reading and oil pressure switch is in working order.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353400 EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
20200409
353400 EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
This technical bulletin provides repair information to correct a customer concern of Blank Radio Display or No Audio.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 110000 ELECTRICAL SYSTEM
20200409
110000 ELECTRICAL SYSTEM
This technical bulletin provides repair information to correct a customer concern of Blank Radio Display or No Audio.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200306
350000 EQUIPMENT
This informational bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only).
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200318
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This warranty administration bulletin provides policy information for courtesy transportation and roadside assistance programs.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 190000 TIRES
20200304
190000 TIRES
This informational bulletin provides information for dealers/technicians on Use of Nitrogen Gas in Tires.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 353000 EQUIPMENT:ELECTRICAL
20200331
353000 EQUIPMENT:ELECTRICAL
This warranty administration bulletin explains to the technician that when using wiring repair labor operations, additional information may be needed when submitting Global Warranty transactions when doing wiring repairs.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 060000 ENGINE AND ENGINE COOLING
20200317
060000 ENGINE AND ENGINE COOLING
This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.
This 2020 GMC SIERRA 2500 Technical Service Bulletin affects the 355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
20200303
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
This warranty administration bulletin provides information on Warranty Administration ? Customer Concern Not Duplicated (CCND) Labor Operation Numbers.
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