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Here are the technical service bulletins we have for the 2020 GMC SIERRA 3500. If you have any questions, do not hesitate to Contact Us:
This 2020 GMC SIERRA 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 Technical Service Bulletin affects the 356000 EQUIPMENT ADAPTIVE
20190628
356000 EQUIPMENT ADAPTIVE
N192265570 - Service Update. Certain vehicles may have misalignment between the transmission output shaft and the transfer case input. Transfer case to transmission misalignment could cause the transfer case shift collar to slip out of enga
This 2020 GMC SIERRA 3500 Technical Service Bulletin affects the 350000 EQUIPMENT
20190628
350000 EQUIPMENT
N192265570 - Service Update. Certain vehicles may have misalignment between the transmission output shaft and the transfer case input. Transfer case to transmission misalignment could cause the transfer case shift collar to slip out of enga
This 2020 GMC SIERRA 3500 Technical Service Bulletin affects the 100000 POWER TRAIN
20190628
100000 POWER TRAIN
N192265570 - Service Update. Certain vehicles may have misalignment between the transmission output shaft and the transfer case input. Transfer case to transmission misalignment could cause the transfer case shift collar to slip out of enga
This 2020 GMC SIERRA 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 Technical Service Bulletin affects the 081100 FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
20200213
081100 FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
This Preliminary information provides information to the technician on relocating the DEF tank to install a service body. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 156. The informa
This 2020 GMC SIERRA 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 Technical Service Bulletin affects the 350000 EQUIPMENT
20200127
350000 EQUIPMENT
This informational bulletin provides retail, wholesale and fleet personnel with General Motors recommendations for customer concerns related to wheel alignment.
This 2020 GMC SIERRA 3500 Technical Service Bulletin affects the 200000 WHEELS
20200127
200000 WHEELS
This informational bulletin provides retail, wholesale and fleet personnel with General Motors recommendations for customer concerns related to wheel alignment.
This 2020 GMC SIERRA 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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 3500 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.
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