GMC Complaints

On Friday 2/21/25, while driving on the Interstate at Highway speeds, the dashboard said to idle the engine. The engine then stalled and thankfully I had enough speed and there was a shoulder available to pull off on. The dashboard then gave many messages including voltage, overheating, high oil temperature, idle engine, etc... I was unable to restart the vehicle on the side of the interstate. I was towed to the dealer who advised the engine would have to be replaced. This vehicle has a 6.2L gas engine with 39,223 (approx) miles.

The shifter, the shift to park displays and dings and stays on the dash after I've put it in park and turned off the ignition. It started the first of 2024 and has gotten worse and now it's almost every time.

The contact owns a 2016 GMC Canyon. The contact stated while driving 65 MPH, the vehicle lost power steering functionality, and the steering wheel became significantly difficult to steer. The power steering, the transfer case, and the anti-sway warning lights were illuminated. The contact was able to veer to the side of the road. The contact turned off and restarted the vehicle, and the vehicle operated as needed. Additionally, the contact stated while driving approximately 50 MPH around a curve, the failure recurred. The contact depressed the brake pedal, and the vehicle decelerated; however, the vehicle went into a ditch, which scratched paint off the front passenger's side plastic bumper. There was no injury sustained. The contact turned off and restarted the vehicle, and the vehicle operated as needed. The contact was able to resume driving. The vehicle was taken to an independent mechanic, where it was diagnosed with steering column sensor failure. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: RQ19001 (Steering). The dealer and the manufacturer were notified of the failure and informed the contact that the VIN was not included in a related recall. The failure mileage was approximately 190,000.

The contact owns a 2022 GMC Terrain. The contact stated while driving in a parking lot, and the brake pedal was depressed; however, the vehicle hesitated and stalled. The vehicle failed to immediately restart but restarted after waiting for 10 minutes. The vehicle was taken to the residence. The contact retrieved DTC: P129F while using a handheld scanner. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 76,670.

Cylinder 5 failure and cam shaft miles 78k. Have to replace full top end or brand new motor cost $10k up to $13k to fix at dealer

The engine lost power then suddenly stopped running while driving on an interstate.

I had a 10 month old 2022 Yukon Denali XL. There was a constant smell of exhaust fumes inside the cabin. Took it into the dealership on multiple occasions and they found a leak in the exhaust system and supposedly fixed it. Less than 24hrs after getting it out of the shop, the engine seized up. Engine was replaced weeks later and within 7 days I started having transmission issue. GMC did absolutely nothing to keep my family of 8 safe.

Truck lost power randomly while driving on freeway spend so much money on fixing it this has to do something with the way the built it

Vehicle was parked in a school parking lot. Rear Trailer Harness and modules in back short circuited causing an electrical fire that expanded to the driver’s taillight rear bumper, and bed of truck.

Vacuum pump failed causing hard brake pedal and the inability to properly stop the vehicle. Thankfully I made it to a safe area and had the vehicle towed. No warning light or engine service lights ever illuminated. Once it was taken apart the bearings were disintegrated and metal shavings are in engine components.