Table 1 shows one common power train related problems of the 2021 Chevrolet Silverado 3500.
| Problem Category | Number of Problems |
|---|---|
| Power Train problems |
The contact owns a 2021 Chevrolet Silverado 3500. The contact stated that while driving approximately 65 mph, the vehicle unexpectedly went into low power mode, with the check engine and low power mode warning lights illuminated. The contact was able to restart the vehicle. The vehicle was taken to an independent mechanic, where dtc: p2706 and p2732 were retrieved, and the contact was informed that the valve body and certain components of the transmission required reprogramming. The vehicle was not repaired. The contact later received notification of NHTSA campaign number: 24v797000 (power train). The dealer was contacted but the vehicle was not diagnosed or repaired by the dealer. The manufacturer was not made aware of the failure. The approximate failure mileage was 146,000.
This is regarding 24v797. A software update to "monitor" for transmission valve failure is not a resolution to a problem that could pose a sever risk to my safety on a very expensive truck.
July 20, we were driving the 2021 3500hd to church w/our single axle trailer w/mower on it when we were stopped at a yield sign and proceeded to pull forward, our truck made a loud boom noise and immediately stopped. Warning lights on the dash began coming on, when the gas pedal was pressed it made a loud rpm sound of engine revving, following by barely coasting action. We were able to drift into the turn lane & get out of danger. We had to be towed to capital Chevrolet bc something isn't functioning properly. Dealership said they believe it's transmission related and the power train warranty should cover repairs needed. We have tow receipt and gas receipts for rental vehicle.
While towing my 5th wheel RV trailer, the rear wheels locked up numerous times while at highway speeds(60-70mph). Hope our didn't cause any internal/ structural damage to my trailer. Scheduled a service with the dealer(gamblins Chevrolet, enumclaw, wa) for them to diagnose. The dealer found no issue or cause. Left the dealer for the same thing to occur the following week. Brought back to the dealer for this issue and others to determine the torque converter had failed, dealer replaced converter, at a later date rear wheels locked up at highway speeds again. Been ongoing with no solution.
When I shift the vehicle to park and turn it off, about 90% of the time the instrument panel will display a message that says “shift to park”, and the electrical components will not shut down. The vehicle is in park, but the computer won’t detect it. I took it to dealer while under warranty, and dealer simply stated that it wasn’t happening. It continues to happen, and I fear that it it won’t shift into park later. As is, sometimes it takes an hour or more to detect that the vehicle is in park. I fear that it will cause a dead battery and leave me stranded. I don’t know if this is a computer issue or a transmission issue. It has been ongoing for at least 10 months. Vehicle was dropped off for repair at dealer in December, 2022, but no repair was performed.
The contact owns a 2021 Chevrolet Silverado 3500. The contact stated that while driving approximately 45 mph the brake pedal extended to the floor when pressed causing the vehicle to nearly collide into the rear of a second vehicle. Moments later the contact discovered that rear driver side brake pad had ejected from the vehicle. The vehicle was later taken to the local mechanic who was unable to determine the exact cause of the failure. The vehicle was not yet repaired. Also, while operating the vehicle the transmission had erroneously disengage out of four wheel drive. The contact indicated that the failure had occurred on multiple occasions. The manufacturer was notified of the failures but no assistance was offered. The failure mileage was 17,000.
Was driving my 3500 (an 8000# truck capable of towing 20k#) and suddenly the vehicle lost power and steering, forcing me to the shoulder of a curvy mountain road, going downhill. Truck then started blinking lights and telling me to restart. Upon restart, the truck would not engage the transmission. Truck was in drive but the motor was just rev'ing. I turned truck off and then back on and it seemed to return to normal. Am not comfortable driving truck at this time. Gm has been notified of the issue, and, has not diagnosed an issue, as of this writing.