GMC Complaints

Side Detection Malfunction Message on Dash. Blind spot and cross traffic alerts not working. Vehicle has a blind spot on the driver's side and without this alert, I have found that vehicles appear to not be there but actually which causes issues with merging traffic and lane changes leading to potential collisions. Dealer replaced the side detection modules under warranty and special policy because of water intrusion into the modules. This exact same symptoms and parts have occurred and replaced 5 times, and a 6th is currently needed. All work was performed exclusively at GMAC dealer and vehicle is accident free. GM issued a special policy that covered this specific repair, and the vehicle now needs to it done a 6th time and GM has refused to assist saying vehicle is out of special policy. I have requested that GM inspect the vehicle but no response. I contacted GM and they declined assistance. I currently have the feature turned off because it was providing an error message on the dash and false alerts. I don't believe that GM actually has a long-term fix for this safety issue. Original Set of Sensors - 0 Miles - 2nd set of sensors - 5,894 Miles - 2/2018 3rd set of sensors - 17,078 Miles - 5/2019 4th set of sensors - 32,546 Miles - 4/2021 5th set of sensors - 45,463 Miles - 3/2023 6th set of sensors - 64,335 Miles - 3/2025

MY BACK WINDOW HAS HAD A LEAK IN IT FOR SOMETIME NOW. I TAKEN IT TO A DEALER THEY SAID THEY HAVE HAD OTHERS WITH THE SAME PROBLEM. BUT THE WARRENTY WON'T COVER IT .I ALWAYS BUY BUMPTER TO BUMPTER SO I DON'THAVE TO WORRY ABOUT THINGS LIKE THIS.IT IS RUINING MY INTERIOR.CAN WE PLEASE GET SOMETHING DONE ABOUT THIS ISSUE.

The contact owns a 2008 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 21V050000 (Air Bags). The local dealer was contacted and informed the contact about the disclaimer about the dashboard possibly being damaged. The dealer informed the contact that there were no loaner vehicles, but then called back and offered a loaner. The manufacturer was contacted and filed a clai,m and referred the contact to another local dealer. The contact called the other local dealer, Ferman Chevrolet of Tarpon Springs (43520 US Hwy 19 N, Tarpon Springs, FL 34689), who confirmed there was a disclaimer related to the recall repair. The contact had not experienced a failure.

The transmission keeps slipping, clunking, and not shifting correctly. Not shifting or down shifting correctly up and down hold or at stops. My husband is a trained mechanic and has confirmed through his place of employment that the transmission is failing. It hasn’t no yet been inspected by the manufacturer, police, insurance. No warning lamps, but the transmission temp rises to 270F+ In regards to the next question.. the issue is ongoing.

The contact owns a 2022 GMC Acadia. The contact stated that the rear passenger side seat belt and driver's side rear seat belt failed to fully extend smoothly while passengers were attempting to buckle the seat belt, or while attempting to secure a car seat inside the vehicle. The contact stated that while pulling the seat belt from the retracted position, the seat belt locked up. The contact had to release the seat belt and then attempt again to securely buckle the seat belt. The contact stated that the rear passenger’s seat belt retractor failed to lock in place while securing the car seat. The contact stated that the belt was very loose. The contact stated that the driver's side rear seat belt was also difficult to secure the car seat. The contact had taken the vehicle to a local dealer, where it was diagnosed, and determined that both seat belt units needed to be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 42,745.

I took my truck through a car wash and then parked at my parents house. While the vehicle was parked, the trunk latch kept releasing. The trunk popped open. I left it open but you could hear the latch continually releasing and the lights blinking. This went on for an hour and I was unable to drive home because my trunk kept unlatching! A recall was released for other Sierras but not mine. Please investigate my vin and others that may be affected.

The contact owns a 2021 GMC Sierra 1500. While the contact's husband was driving at an undisclosed speed, the contact noticed an abnormally bumpy ride. The contact felt as if the vehicle was driving over rocks. The check engine warning light was illuminated. The vehicle was taken to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, parts were not yet available for the recall repair. In addition, the contact stated that the vehicle had been at the dealer for more than two months awaiting parts. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 80,000.

The contact owns a 2024 GMC Sierra 1500. The contact stated that while operating the vehicle, the windshield washer fluid activated unintendedly and sprayed over the front windshield, causing a visibility hazard for the driver. The vehicle was taken to the local dealer who repaired a loosened electrical wire, and the vehicle was repaired. Additionally, the radio cluster unintendedly deactivated, and the OnStar Service became unavailable. The vehicle was taken to the local dealer who replaced the radio cluster, but the failure persisted. The manufacturer was not yet contacted regarding the failure. The failure mileage was 3,000.

The contact's uncle owns a 2012 GMC Terrain. The contact stated that while driving 34-35 MPH, the vehicle stalled. There was no warning light illuminated. The contact was able to pull over to the side of the road and allowed the vehicle to cool down. The contact drove to the residence under 15 MPH. The vehicle was taken to the dealer, where it was diagnosed that the variable valve timing chain was bent, and the dealer determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 100,000.

We have been having varying issues with this GMC, and have found numerous others with the same issue. Vacuum pump went out while driving. Thankfully I was not going very fast and it stopped prior to hitting someone. This is a known issue, yet no recall from GMC. Vacuum pump is said to have been failing causing other engine and transmission issues that can never be "re-created" for the vehicle to be fixed.