2020 Chevrolet Silverado 2500 Transmission Problems

Mileage when the problem started

• Under 25k
  111%
• 25k–50k
  00%
• 50k–75k
  222%
• 75k–100k
  333%
• 100k–150k
  111%
• 150k+
  222%

Owner reports

Selected complaints filed with NHTSA by 2020 Chevrolet Silverado 2500 owners, lightly cleaned up (personal details are redacted by NHTSA).

The contact owns a 2020 Chevrolet Silverado 2500 HD. The contact stated that while driving at 50 MPH, a warning alarm engaged and advised that there was an emission system issue and the vehicle needed to be serviced within 160 miles. The transmission warning light illuminated. The contact stated that she parked at some point to run an errand and upon restarting the vehicle, a death issue system alarm engaged indicating that the vehicle needed to be repaired within 90 miles. The vehicle was taken to the local dealer where the failure was diagnosed as a dead issue and one of the pins on the wiring harness had burnt and was starting to melt. The local dealer informed the contact that the death tank and wiring harness needed to be replaced; however, the parts for the repair were not available the vehicle was not drivable. The vehicle was not repaired. …

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving at 55 MPH, the tachometer was operating erratically, after which the vehicle lost motive power. The contact was able to pull to the shoulder of the roadway, and after a visual inspection, the contact observed transmission fluid pooling underneath the vehicle. The service electric parking brake warning light was illuminated. The vehicle was towed to the dealer, who determined that the transmission oil cooler line failed at the crimp and that a failure with the electric parking brake had caused abnormal wear and tear to the brake pads and rotors. The vehicle was not repaired. The vehicle was then towed to another dealer, who confirmed the diagnosis, adding that the failure resulted in damage to the transmission, requiring a replacement of the transmission. The vehicle was repaired. …

Truck on its own Shift from Park to Drive on its own while at idle. Summary: My 2020 Silverado 2500HD was in the driveway idling in Park. The vehicle was empty and I was checking the garage for screws from a project I had just completed and I wanted to make sure they were all picked up before I parked the truck in the garage so that I did not get a flat tire. After looking for screws and assuring myself everything was cleaned I proceeded into the third bay of our garage and right behind me by an inch the truck proceeded into the garage at a good rate of speed and crashed into the house. I quickly ran through the third bay and to the vehicle as it was still wanting to proceed into the house. I quickly shifted it into Reverse from Drive backed up about 2 to 3 feet and placed the truck back into Park again and placed the emergency brake on and shut the truck off...

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving 30-50 MPH on four occasions, the rear wheels locked up. There were no warning lights illuminated. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. The vehicle was taken to the local dealer, where it was diagnosed that a software update was needed. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the local dealer, who was unable to duplicate the failure. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 81,381. VIN tool confirms parts not available.

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated while driving at various speeds, the transmission was slipping without warning. The vehicle stalled without warning, causing the contact to restart the vehicle to continue driving. While attempting to accelerate, especially, after the vehicle was idling, the transmission failed to properly change gear, causing the vehicle to accelerate at slower speeds than intended. There were no warning lights illuminated. The vehicle had been taken to the dealer where it was diagnosed that the transmission failed and needed to be replaced. The vehicle had not been repaired due to a low supply of transmissions. The manufacturer was made aware of the failure. The manufacturer referred the contact to the NHTSA Hotline to file a safety complaint. The failure mileage was 80,000.

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving approximately 55 MPH, there was smoke coming from the rear of the vehicle. The contact stated that the vehicle then started losing motive power. After stopping to inspect the vehicle it was discovered that there was transmission fluid leaking from the rear of the vehicle. The vehicle was towed to the local dealer who diagnosed that the transmission cooling line had failed and needed to be replaced. The vehicle was not yet repaired. The contact stated the Extended Coverage for the failure was issued but the VIN was not included. The failure mileage was 67,000.

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving at an undisclosed speed, the rear wheels locked up momentarily. The check engine warning light was illuminated. The vehicle was previously taken to the local dealer to be repaired under NHTSA Campaign Number: 24V797000 (Power Train). The vehicle was repaired, but the failure recurred. The manufacturer was contacted, who confirmed that the recall repair was a one-time free repair, and no further assistance was provided. The failure mileage was approximately 188,000.

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that the transmission shuddered and hesitated while driving 55 MPH or at higher speed. The vehicle was taken to the dealer; however, the dealer was no longer in business. While driving at various speeds, the lifters were squeaking. The vehicle was taken to a dealer and was diagnosed with lifters failure. The contact decided not to repair the vehicle. The manufacturer was informed of the failure. The failure mileage was approximately 170,000.

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving at an undisclosed speed, the transmission was slipping and shifting hard. The contact associated the failure with NHTSA Campaign Number: 26V083000 (Power Train); however, the VIN was not included. The dealer was notified of the failure, but the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 120,000.

In 2024, I noticed that my truck was experiencing rough shifts. It felt as if the back wheels were jerking over uneven ground, even though the vehicle was on a flat surface. In November 2024, my sister sent me an article about General Motors' massive recall due to rear wheel lock-up, which increased the risk of crashes. I contacted GM and learned that my truck was part of the recall. I reported the issues my truck was exhibiting, and GM instructed me to reach out to my dealer about the problem. However, I was informed that they did not have the parts to fix the issue and had no idea when they would receive them. I asked GM if they would provide me with a rental vehicle, but they declined, stating that if they offered a rental to me, they would have to provide one for others as well, which was not feasible due to the large number of affected vehicles. …

Related recalls

Transmission complaints in other Silverado 2500 years