Rear wheels locked up while driving/accelerating. Happened 5 times, 4 times while towing a camper once without towing. Luckily no harm or damage came to anyone. Traded in at dealership due to safety concerns after no diagnostics found anything -??wrong-??. It is already listed for sale, but I don-??t think It-??s been addressed or fixed.

- Clinton, TN, USA

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.

- Noblesville, IN, USA

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. After investigating the failure, the contact related the failure to Customer Satisfaction Program: N212326940, but the VIN was not included. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 67,000.

- Middle Grove, NY, USA

Vehicle lost power as a result of a bad shorted out connector on diesel injector 4 and caused engine misfires. Which resulted in the vehicle being under powered while driving down the road

- Central, SC, USA

The Transmission Oil Cooler line separated at the crimp joint from the rubber hose to metal pipe. This sprayed trans fluid all over my hot exhaust(fire risk) and caused and immediate loss of propulsion as I was accelerating to merge onto the highway. I was lucky enough to have multiple vehicles swerve to avoid hitting me. This defect left me on the side of the expressway.

- Vassar, MI, USA

DEF tank heater short causes wiring harness to melt and fault on diesel trucks, enabling limp mode. Limp mode is dangerous when hauling trailers over long distances. Faulty part is on 6 month backorder. No reparations from GM.

- Massillon, OH, USA

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 manufacturer was notified of the failure and advised the contact the parts for the repair were not available. The vehicle was not repaired. The failure mileage was approximately 20,000.

- Shelburne Falls, MA, USA

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...

- Richmond Hill, GA, USA

The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving, the vehicle independently shifted into four wheel drive. The contact stated that the vehicle was manually shifted back into drive. The contact stated that the failure destroyed the front end, the differential, and axle. The contact was concerned that that there was a manufacturer's design flaw with the vehicle. The vehicle was taken to radley Chevrolet (3670 jefferson davis hwy, fredericksburg, va 22408) however, the technician was unable to duplicate the failure. The vehicle was later taken to an independent mechanic where it was diagnosed that the front differential was damaged and needed to be replaced. The technician mentioned that the failure was due to the design flaw of the auto mode feature. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 8,400.

- Fredericksburg, VA, USA