GMC Complaints

Engine failure occurred while driving with two children in the vehicle, creating a serious safety hazard. The vehicle experienced a sudden loss of power and stalled completely while in motion, with no prior warning lights, alerts, or messages. Prior to this failure, the vehicle had already failed the GM PICO test related to the known L87 engine issue, and the recommended corrective action was changing the oil to 0W-40 synthetic and replacing the oil cap. Despite that intervention, the engine still failed at approximately 49,000 miles. A sudden complete engine stall without warning while driving created a dangerous situation, particularly with children in the vehicle. This raises concern that the prior corrective action did not resolve the underlying defect..

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving approximately 15 MPH the rear wheels suddenly seized causing the vehicle to abruptly stop in the middle of the road. The vehicle was restarted and slowly driven home. The contact indicated that later after restarting the vehicle it was discovered that the vehicle would not drive forward or in reverse. The vehicle was later towed to the local dealer who diagnosed that the transmission had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The manufacturer was notified of the failure. and referred the contact to the NHTSA Hotline. The contact was informed that the VIN was not included in the NHTSA Campaign Number: 26V083000(POWER TRAIN ). The contact indicated that the vehicle had experienced that same failure listed in the recall. The failure mileage was 67,000.

Vehicle stalled while driving and would not restart. Strong gasoline smell present and on ground. Third occurrence. Vehicle stalled while driving at on busy road (safety issue both times). Strong raw gas smell. Would not crank afterward. Dash powered normally with check engine light. Happened previously around 27k miles in September 2025. Occurred again May 9, 2026. Occurred again today l, May 18, 2026. Vehicles is being towed to dealership again for the 3rd time

Back up camera randomly stops working (black screen-completely gone, or blue screen). Dash will randomly dim on its own and does not go back to normal unless car is shut off and turned back on. adaptive cruise control will disengage for no apparent reason. stabilitrak will flash on screen but no other indicators or reasons; nothing happens with car. Occasionally the blind spot mirror lights will not light up when vehicle is present.

Paint flaking top above windshield within one year of ownership! Paint flaking on left rear door within last month!

The contact owns a 2015 GMC Acadia. The contact stated that while parked he observed the drivers seat belt that the braided steal cable was broken and the seat belt clasp was barley hanging on. The vehicle was taken to an independent mechanic where it was diagnosed that the drivers seat belt was broke and was hanging off and needed to be replaced. The manufacturer was notified of the failure. The failure was 178,600.

Windshield wiper mechanism broke while driving in heavy heavy rain near [XXX] . Extremely dangerous situation and almost resulted in a crash but I was able to make my way off of the interstate safely. Huge inconvenience because we had to wait out the rain! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The vacuum pump for the brake system failed catastrophically while driving causing damage to the brake booster and lodging metal debree into the engine components. This happened at less than 100k miles on a 2020 gmc terrain.

The front upper grille deflector detached and hit my windshield and bounced off behind me during a drive at normal highway speeds. This created a random flying debris object that appears to have been a problem with the 2022 and later Sierra 1500 models; however, the recall only appears to address the 2022 model. It also appears quite common for the 2024 year model as well. Vehicle has never been in an accident so nothing beyond typical use would have caused damaged to the connections. The plastic connectors appeared to have failed.

Driving the vehicle with my family in it on merrit parkway in ct 230 am on May 10 th Car rpm start going up and making noises and felt like gear not shifting in few seconds later car all sudden on its own shifted to neutral as my speed 55-60 mph was during that moment. And screen on dash went blank dark .i was able to move to side of the road safe as possible .road is only two lane and no room to park on side . Immediately turn hazards lights on and try to restart the car and vehicle will not turn on . State troopers came and assisted us till tow truck came and vehicle get towed to dealer