GMC Complaints

While the key is still in the ignition (first time, vehicle was running; second time, vehicle was off), the car doors locked without any one pushing the button to lock the doors.

The thermostat housing fails and is a known issue which causes the car to overheat and they said it will start of fire or shut down and loss of steering assist. The dealerships know about the issue and GMC does nothing leaving people with large repair bills or inoperable cars. the system won't let me upload my receipts here is the part #12678780 I was told by the dealership this is a known issue and they my emissions warranty only covers the thermostat but not the housing, but that they are 1 piece, playing games.....

The contact owns a 2014 GMC Acadia. The contact received notification of NHTSA Campaign Number: 23V334000 (Air Bags) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.

I am on my 4th radiator and 3rd thermostat. August will be 1 year ! 2014 models are covered 2015 (like mine) is not covered. Transmission has shifted like crab since day of purchase 3 years ago. I am told it is a known issue from the factory with no solution. Truck also had a weird tick sense day one which turned into 2 failed valve springs. I have had 2 ball joints FAIL 1st time a month after purchase in my driveway. Second time 2000 miles later same side on my street

Annunciations: Stabilitrak, Park Assist Off, Steering Assist Is Reduced Drive With Care, Forward Collision System Unavailable, Adaptive Cruise Control. Indications: Cruise Control doesn’t work, steering jerks when turning, difficult to turn into parking spaces. Research shows Technical Service Bulletin 18-na-161as a known issue with GMC products. Dealer says “You are out of warranty”. 2018 model with 65,000 miles. Issue has been presenting for the past 8 months. We thought it was due to a windshield replacement by Safelite. Safelite has been actively troubleshooting for 8 months.

The contact owns a 2019 GMC Terrain. The contact stated while driving 30 MPH, the brake pedal was depressed, but the vehicle failed to stop immediately. The contact slammed on the brake pedal, and the vehicle came to a stop. The contact coasted the vehicle to the median. The vehicle was restarted and driven to the residence. Upon inspection, the contact noticed that the brake fluid was dark in color. The vehicle was taken to an independent mechanic, who diagnosed that the vacuum pump had failed and exploded in the camshaft. The vehicle was then towed to the dealer, where it was determined that the vacuum pump, camshaft, valve cover gasket, and water pump needed to be replaced, along with an oil change. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 120,000.

The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving approximately 15 MPH into oncoming traffic, the vehicle lost power steering functionality. The contact used excessive force to maneuver the vehicle. There were no warning lights illuminated. The contact became aware of NHTSA Campaign Number: 18V586000 (Steering). The dealer was contacted, and it was confirmed that the vehicle had previously been repaired under the recall and could not be repaired a second time under the recall. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure and confirmed that the VIN was no longer under recall. The failure mileage was 123,000.

I was driving down the highway between 65 and 70 MPH. The semi-truck in front of me almost missed his turn and stopped quickly to make a 90 degree turn off the highway. I went to slow my vehicle appropriately, and my brakes did not respond. I had no warning that my brakes were compromised. I quickly used the downshift button to use my engine to slow me down and I crashed my vehicle off the road into the sagebrush (luckily no trees and there wasn't a dramatic drop off). At that time, after my vehicle came to a stop, I received a warning on my dash that stated "service brake assist". I looked up the issue on my phone to see what may have happened, and read that GMC had a recall for this very issue. I contacted the dealership and they indicated that they were aware that the 2018 GMC Terrain has this issue, but it was not included in the recall. I am traumatized by this incident. I am a very experienced driver, but I had bought this vehicle for my daughter, had she been driving, this would have been a catastrophic accident. I have nightmares about if this had failed when approaching a crosswalk or in a school zone. If GMC is aware of the problem, and they had a full recall on this on other models with this same problem, why aren't they fixing the Terrain, why are they waiting for a fatality. It is unacceptable, dangerous, and I don't even want to know what the cost is going to be to repair the vehicle. I am thankful it wasn't much worse.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while the vehicle was being driven or parked, the tailgate was inadvertently unlatched. There was no warning light illuminated. The vehicle was taken to a local dealer where the failure was linked to NHTSA Campaign Number: 24V060000 (Latches/Locks/Linkages). The vehicle was not repaired. The manufacturer was made aware of the failure; however, the contact was referred to the NHTSA Hotline. The failure mileage was 141,000.

The contact owns a 2016 GMC Sierra 2500 HD. The contact stated that while driving at 64 MPH, he crashed head-on with a 350-pound deer. The deer went underneath the vehicle, and the driver ran over it with the passenger front tire. The driver's side air bag did not deploy. The air bag warning light was illuminated. There were no reported injuries or fire. A police report was filed. The contact was able to drive away from the crash. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 85,379. Additionally, while driving in the snow, a motorcycle crashed into the rear of his vehicle. The driver-side front air bag did not deploy. There was an abnormal sizzling sound, and smoke was detected. There were no warning lights illuminated, There were no reported injuries, fore or police report. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was contacted. The failure mileage was unknown.