GM has released a new service update for the 2022 GMC Sierra 1500 in regard to poor shifting quality from the truck’s automatic transmission.
The problem: certain units of the 2022 GMC Sierra 1500 may exhibit a condition wherein the automatic transmission provides poor-quality shifts. What’s more, the pickup’s Malfunction Indicator Lamp (MIL) may also be illuminated.
The hazards: there are currently no known safety hazards related to this service update.
The fix: to address this automatic transmission shifting issue, GM has instructed technicians to replace the GMC Sierra 1500’s transmission control module. Additionally, the related software may need to be reprogrammed as well.
Affected components: transmission control module.
Affected vehicles: certain units of the 2022 GMC Sierra 1500. Note that this service update applies to fully refreshed 2022 GMC Sierra 1500 unveiled in October of 2021, as opposed to the pre-refresh 2022 GMC Sierra 1500 Limited. It should also be noted that this service update also applies to certain units of the refreshed 2022 Chevy Silverado 1500.
Number of affected vehicles: it’s currently unknown how many units of the refreshed 2022 GMC Sierra 1500 are affected by this particular service update.
Owners should: owners can contact GMC directly with any concerns they may have using the contact information listed below.
- GM Service Update number: N222383250
- GMC U.S. Customer Service: 1-800-462-8782
GM is instructing dealers to ensure that any vehicle that is subject to this service update and still covered under the New Vehicle Limited Warranty, including those that enter vehicle inventory or dropped off for service, must receive the service update correction before it is released or sold. Any vehicle that is subject to this service update must be inspected and repaired prior to customers take possession of the vehicle, while involved vehicles cannot be delivered to customers, traded, released to auction, or used for demonstration purposes.
As a reminder, the refreshed 2022 GMC Sierra 1500 is available with both the GM eight-speed automatic transmission (RPO code MQE) and GM 10-speed automatic transmission (RPO code MQB). It’s unclear at this time if this service update applies to one or both transmissions.