General Motors has decided that a problem affecting vehicle steering exists in certain 2021 Cadillac, Chevrolet and GMC trucks. GM opened an investigation into the condition after receiving a field report of loss of power steering assist in a 2021 GMC Yukon.
According to the defect report, diagnostic trouble code (DTC) data obtained from the vehicle indicated that the power steering system may contain a software error that causes loss of power steering assist at startup or while driving. Vehicle testing demonstrated that manual steering remained available without power assist, but increased steering effort was required, particularly at lower speeds. In most cases, the malfunction indicator light will display on the instrument panel and a warning chime will sound. The condition is typically self-corrected at the next ignition cycle.
| Vehicles Affected Include |
|---|
| 2021 Cadillac Escalade |
| 2021 Cadillac Escalade ESV |
| 2021 Chevrolet Suburban |
| 2021 Chevrolet Tahoe |
| 2021 GMC Yukon |
| 2021 GMC Yukon XL |
GM will update the software in the vehicles’ power steering module. Owners will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may schedule to have the updates performed at a GM dealer. A certain number of vehicles that were part of GM’s captured test fleet will require replacement of the steering gear motor kit in order to receive the updated software.
GM’s number for this recall is N212333900 and the NHTSA campaign number is 21V-455.
