GMC Sierra 2500

While driving my truck on the highway at 65 mph the truck bucked hard and immediately downshifted into 2nd gear. This caused me to rapidly decelerate to approximately 40 mph, I am lucky there was not another vehicle behind me when this happened since rapid unexpected deceleration without brake lights is very dangerous. I had to drive the truck in limp mode at 45mph and approximately 4500 rpms to the nearest exit. This event illuminated the trucks check engine light and displayed a brief service…

The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving 5 MPH, the vehicle lost brake and power steering functionality, and there was smoke coming from underneath the hood. The contact stated that power steering fluid was leaking onto the engine. No warning lights were illuminated. The vehicle was towed to a local dealer, where it was diagnosed, and the contact was informed that the power steering pump had seized, the belt and hoses had failed, and the parts needed to be…

Aug 14th, 9:49 pm - Vehicle was placed in park and driver got out. A few seconds later the vehicle started moving forward under its own power towards the driver who was now infront of vehicle walking foward away from vehicle. Passenger hopped over the driver seat to press on brake pedal to stop vehicle. At same time, driver turned around and noticed vehicle moving towards him. Passenger was able to stop vehicle but not before it ran off the driveway and into and over a recreational firepit…

The Exhaust Pressure Differential Sensor Pipe (boost pipe) blew off while towing a heavy trailer uphill on a busy interstate. I had to cross 3 lanes of traffic to get as far as possible off the road. The truck was sent into limp mode and would barely crawl. Our lives were put at risk of being hit by the many tractor trailers traveling that highway, or another driver traveling at high speeds. The truck was eventually towed to the nearest GM dealer for service. The pipe was replaced, but the…

The control valve body failed. There are so many, that there was a shortage of parts. Had to take it in as it went into limp mode. 34,000 miles. There were dozens of trucks, same year, waiting for the same repair. Shop says probably every truck will need it. It is a known issue.

My 2025 GMC Sierra 2500 experienced repeated electrical failures that caused complete battery drainage and multiple overnight no‑start conditions within the first year of ownership. These failures occurred in extreme desert heat, where temperatures in [XXX] reach 120°F. A vehicle that repeatedly fails to start in these conditions creates a serious safety hazard, including risk of heat‑related medical emergencies if stranded. The defect persisted despite multiple repair attempts and two battery…

The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the rear axle unexpectedly locked up, and the vehicle stopped in the middle of the road. The rear axle independently released, and the vehicle was driven back to the residence. The dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 76,300.

The contact owns a 2012 GMC Sierra 2500 equipped with Armstrong Tires, Tire Line: Tru Trac HT, Tire Size: 245/75/17, DOT Number: 1E6DAE022625. The contact stated that the vehicle was taken to an independent mechanic for a routine tire rotation but was informed there were massive bubbles on the tires, and on one tire, there was a bulge the size of an apple on the sidewall of the tire. The contact replaced the tires. The local dealer was not contacted. The manufacturer was contacted and declined…

Ongoing issues with Steering pull to right, and brake pull to hard right when applying brakes, which also turns steering wheel to right upon application. Have to keep steering wheel towards left with constant pressure to go in straight line and when braking. Driver has to be aware of changing road conditions that could affect that. Multiple inspections at multiple dealers have found no obvious issues, and multiple alignments performed, with tires also being replaced have had no success in…

On Saturday, XXX, at around 3:00 PM, my wife and I were traveling southbound on Interstate XXX toward [XXX] (this occurred in [XXX], just north of [XXX]). We were driving our 2023 GMC Sierra 2500HD pickup while towing our 36-foot 5th wheel trailer. I was traveling at approximately 60 miles per hour, and there was heavy traffic on the highway. Just north of Highway XXX, the passenger rear tire delaminated and went flat. The tread came off the tire, striking the wheel well, rear bumper, and…