One problem related to automatic transmission control module has been reported for the 2020 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 GMC Sierra 1500 based on all problems reported for the 2020 Sierra 1500.
The contact owns a 2020 GMC Sierra 1500. The contact stated while driving approximately 40-60 mph, the transmission hesitated while depressing the accelerator pedal. A dealer was contacted. The vehicle was taken to the dealer and was diagnosed with transmission control module (tcm) failure. The contact was informed that the tcm needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA campaign number: 24v797000 (power train); however, the VIN was not included in the recall. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline to report the failure. The failure mileage was 75,200.
| Power Train problems | |
| Automatic Transmission Torque Converter problems | |
| Automatic Transmission Control Module problems |