One problem related to automatic transmission has been reported for the 2021 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 GMC Sierra 2500 based on all problems reported for the 2021 Sierra 2500.
The contact owns a 2021 GMC sierra. The contact stated that while driving at approximately 70 mph, the vehicle lost power. A " vehicle will not go above 50 mph " message appeared. The vehicle was taken to a dealer where it was sitting been for over four months after being diagnosed that the solenoid valve and transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 50,000.
| Power Train problems | |
| Automatic Transmission problems |