GMC Complaints

The contact owns a 2022 GMC Sierra 1500 Denali. The contact stated that the VIN was not included in NHTSA Campaign Number: 24V797000 (Power Train). While the contact’s husband was driving 55 MPH, the vehicle stalled, the rear wheels locked up, and the vehicle decelerated until coming to a full stop. The engine warning light was illuminated. The contact stated that the vehicle was towed to dealer and was diagnosed with transmission control valve failure. The vehicle was not repaired. The contact associated the failure with the recall. The manufacturer was made aware of the failure. The failure mileage was approximately 80,400.

Took my vehicle in for general maintenance upkeep (oil change, tire rotation, vehicle inspection) and was notified my engine is already showing signs persistent with the recall on the 6.2L L87, specifically not holding oil. The dipstick was not showing signs of any fluid being in the vehicle.

Driving to work and the vehicle suddenly turned off in the middle of the road just as I had turned the corner onto another street leaving me in a dangerous spot. There was no warning lights or anything it just shut off and would not start back up. Sister had to wait with vehicle while brother in law drove me to work. Had to have the vehicle towed to Tinney Chevrolet GMC service department and after they completed their service found out the FUEL PUMP MODULE failed. I was told GMC has open recall for 2022 GMC Terrain on this exact issue but for some reason my VIN number doesn't come from the HUB they issued the recall from? I find it suspicious my vehicle had the exact same part fail and left me in a dangerous situation with traffic coming around the corner as well as the inconvenience of family having to come take me to work and sit with my vehicle waiting for the tow truck. I had a bill from the service dept. for this repair of $671.15 and the towing company was $125.00 I would hope GMC would look into the fuel pump module issue for all 2022 GMC Terrain vehicles.

The problem is in the power-locking manual tailgate’s exterior release switch assembly. Water intrusion into the switch can cause a short circuit, leading the tailgate to unlatch while the truck is in Park. Once moving, momentum and air pressure can cause the tailgate to open further, potentially dumping cargo onto the road and creating a hazard.

The contact owns a 2010 GMC Acadia. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from the vehicle. The contact became aware of white smoke coming from the vents. No warning lights were illuminated. The vehicle was driven to the shoulder of the road. The contact and minor children exited the vehicle. The contact stated that while exiting the vehicle, there was fire coming from underneath the hood. The Fire truck arrived on the scene and extinguished the fire. The vehicle was towed to a local tow yard. The vehicle had liability coverage, and the insurance company declined to inspect the vehicle. The contact stated that the vehicle was a total loss. The failure had occurred while the contact's minor children were seated in the rear seat of the vehicle. The contact and the children sustained smoke-related injuries. The contact and the children later received medical treatment for the smoke-related injuries. The manufacturer was made aware of the failure, and a case was filed. The manufacturer declined to inspect the vehicle. The failure mileage was approximately 163,000.

Vehicle had previously undergone the GM 6.2L engine recall inspection on October 17, 2025, and was determined to have passed. On June 13, 2026, at approximately 80,390 miles, the vehicle suddenly lost propulsion while being driven with five children in the vehicle. The vehicle became inoperable and required towing. Dealer subsequently diagnosed engine failure and has ordered a replacement engine. This failure happened with out warning.

Accelerator lag from any speed or stop. The care will take several seconds to hunt for the correct gear before shifting to accelerate. Or it will delay acceleration for several seconds while your pressing the accelerator. No SES indicator active. Mechanics can’t find issues. Other owners on forum a report the same sluggish behavior. These 1.5 turbo cars seem to need a software fix that they are not receiving. It’s like the drive by wire doesn’t register. Affects any gm vehicle with the 1.5 turbo and 9 spd auto.

Normal driving 40mph brake failure and power steering loss. Towed vehicle to dealership

1. The L87 Engine Loss of Propulsion failed and is available for inspection at the service department at Power Swain Chevrolet dealership, Fayetteville, NC. 2. I, other vehicles, cyclists, and pedestrians were at risk. That vehicle could have come down on the highway, causing a vehicle pileup, which could have caused mass casualties. 3. The problem is known; the service advisor informed me the vehicle's engine needed to be replaced. 4. There were absolutely zero warning lamps or My GMC app alerts to announce vehicle issues. I have attached the last two maintenance records I have on hand. I suspect the dealership will try to deny responsibility for repairs. An extended warranty most nearly means we expect it to break down and your safety is not our concern.

When sitting at idle, the engine miss & spark knock at times. When start driving down the road the throttle seems hard to Press & takes a little time to reach up to road speed. The truck does not get good gas mileage at all. I had the spark plugs & wires changed still don't help.