2025 Chevrolet Silverado 2500

While driving at a speed of around 40 mph on a paved city street in Bozeman, MT, I heard and felt a Super loud clunk in my Chevy engine transmission or drive train.. I immediately stopped to see if something ran into the vehicle. No apparent visual damage of any kind. It felt and sounded like like something jammed within the transmission or drive train. The truck has less than 12k miles and has been babied so far. I love the truck. Oil level is normal and nothing leaking underneath..I took it immediately to Billion GMC in Bozeman. They found nothing wrong however the service manager recounted this regarding another customer who described the exact same issue with the same year vehicle and same transmission: Another GMC owner experienced the same symptom before the transmission seized at highway speed and locked the wheels. Because this presents a potential loss-of-control hazard, I am requesting that Chevrolet open a Technical Assistance Center case, document all diagnostic findings in writing, and determine whether the vehicle is safe to operate before returning it to me. The service manager who recounted this event is named Jay.

I was driving the truck on my way to work in [XXX] , last March 12, 2026, at around 6:50 am. It was raining when I entered the exit ramp to work going west; the truck died, and the steering wheel locked. I tried to start it, but it wouldn't. The dashboard displayed: 'Trailer Park Brake Failed,' 'Power Steering Pump Needs Service,' and 'Axle Repair Error.' I was on the exit ramp for a highway that runs north and south, and I could have been t-boned; it was still dark. The truck was towed to Curry Chevrolet in Scarsdale. They said it was the ECM and ordered the part. They installed the new ECM module last Tuesday, March 17. The service manager called me and said they tested the truck, but it is still showing active codes. A GM advisor called me saying the truck should be ready for pickup this Friday. However, this afternoon, I got a call from the service manager saying there is another issue—the engine wiring harness—and they will order the part; now it will not be ready until next week. GM owes me my life. I do not want to drive the vehicle. The service department people at Curry Chevrolet are very professional, but did I pay and spend a lot of money for a garbage truck? INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2025 Chevrolet Silverado 2500. The contact stated while her husband was hauling a trailer and driving 55 MPH in the snow, the vehicle lost power steering functionality. In addition, the contact stated the vehicle failed to accelerate as intended while depressing the accelerator pedal before slamming into gear. The RPM fluctuated up to 6,500 RPM. The contact stated that the check engine warning light was illuminated. The contact's husband was able to coast to the side of the road. The vehicle was turned off but failed to restart. The contact's husband stepped out of the vehicle, and the vehicle restarted automatically. The vehicle was towed to a dealer, where it was diagnosed that the wiring was for a diesel vehicle; however, the contact's vehicle was gasoline operated. The contact was informed that the wiring harness control arm had rubbed against the control arm, causing the electrical system to short-circuit. The vehicle was repaired. The failure had progressively gotten worse. Most recently, the contact stated that the vehicle vibrated abnormally while driving. The vehicle was taken to the dealer; however, no cause for the failure was found. The contact stated that a seal was placed on the transmission. The manufacturer was made aware of the failure but denied assistance. The failure mileage was approximately 42,000.

The contact owns a 2025 Chevrolet Silverado 2500. The contact stated while driving 30 MPH, the engine light illuminated. There was an extremely loud knocking sound coming from the engine. The vehicle was taken to the local dealer and was diagnosed with a misfire in cylinder #2. There was no compression in cylinder #2. The vehicle was also experiencing catalytic convertor failure. The mechanic used a microscopic camera and determined that the cylinder wall and piston head were damaged. The contact was informed that the engine and turbo needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 30. The VIN was not available.

Vehicle loses power when entering roadway. Vehicle fires at idle. Vehicle dies on roadway. Vehicle lurches aggressively without control. Vehicle shifts erratically and with aggression. DEALER STATED GM known issue where wires were run to the oxygen sensor wrong. Run across exhaust pipe. Exhaust melted wires to O2 and caused a short which computer poorly responds to.