GMC Complaints

While driving in the rain, the windshield wipers were on the highest intermittent setting and the high beam headlights were also on, automatic highbeams were not. The high beam lights dimmed to low, and the windshield wipers stopped in the middle of the windshield in the middle of navigating a sharp right hand turn at 35mph. The wipers stopped for approximately 30 seconds and then resumed operation. When the wipers resumed operation, the headlights also turned back on high with no input from the driver.

While driving in bumper-to-bumper traffic, my vehicle suddenly lost all engine power, the accelerator became unresponsive and the dash indicated "press start". There were no warning lights, no messages, and no prior symptoms before the failure occurred. I was in an active traffic lane when this happened, which immediately placed me and others at risk of being rear-ended. After several seconds, and pressing the start button, the vehicle regained power. But the odometer was indicating I was going 30+ mph when I was going less than 10 mph, so I pulled over to the side of the road. The vehicle is also was having issues with the lane keeping assistance was unavailable. This is is a new vehicle purchase directly from the dealer in August 2025, with approximately 4,500 miles at the time of the incident that occurred on, 11/18. The problem has not been reproduced by the dealership, and no diagnostic trouble codes were found. The vehicle has been at the dealer for inspection since 11/20, but I was informed that the issue would need to happen again before they could diagnose it. This type of sudden power loss while driving is a serious safety concern, especially because it occurred without warning and could happen again unpredictably. At this time, the cause it UNKNOWN, but the component or system responsible for the power loss should be inspected. The failure appears to be intermittent and without warning.

During takeoff the transmission acted as if it was in neutral while I was crossing traffic luckily, the semi truck that was coming towards me was able to stop. I had the vehicle towed to a shop. After the vehicle was towed to the shop the transmission acted normal when the mechanic searched the VIN number. There was a service bulletin issued by General Motors for this exact problem. Had the semi not been able to stop. It could’ve very well killed me or my children. I suppose if it would’ve killed someone, maybe general motors would finally do a recall for this very disappointed in general motors and the NHTSA, the fact that this is an ongoing problem and has not been fixed and as a customer, I was not even notified that this problem existed is very alarming.

Purchased vehicle in July 2025. Started having the engine failure issues described in recall "L87 Engine Loss of Propulsion (Related field action: See Special Coverage N252494003)". GM says that the recall work was completed in May of 2025, however, the same exact issue as described in the recall exists. Engine fails during vehicle operation, the vehicle will lose propulsion, increasing the risk of a crash. We believe the recall fix was not performed properly as vehicle has same issue. Dealership has not helped us and GM referred us to you.

The steering assist message comes on and off whenever the weather gets cold in the fall and winter. This causes my air conditioning and/or heater to not work. I have done research and the temperature sensor needs to get replaced because there is a malfunction of the temperature not reading the coolant. Everything is fine with fluids and driving. This happened when I turned on the heater.

Getting a pop up that says “steering assist reduced”. Temp gauge drops completely. AC won’t work and fan kicks on

The contact's grandson owns a 2021 GMC Sierra 1500. The contact stated that after the vehicle was purchased from a private seller and driven 258 miles, while his grandson was merging off the exit ramp, the engine seized. The low oil pressure warning light was illuminated. The contact stated that the check engine warning light was illuminated prior to the failure. The vehicle was towed to the contact's residence. The contact scanned the vehicle and retrieved DTCs: P0011, P0016, P006DD, and P0521, stored DTCs: P06DD P0011, and permanent DTCs: P0011 and P0016. The engine was replaced by the contact. The local dealer was contacted for parts. No further information was available. The manufacturer was not contacted. The failure mileage was approximately 100,148.

"STEERING ASSIST REDUCED. DRIVE WITH CARE" message, fan runs nonstop, even after the vehicle is off. Sounds like a plane taking off. This seems to be EXTREMELY common after doing my research. Please consider turning this into a recall!

The CAM Sensor Failed and the reluctor ring was chipped. They could not determine without spending hours taking a part the engine if it was a piece of metal from the current recall that chipped off and broke the reluctor ring. No problems until immediate failure and had to had the car towed to the shop to identify issue.

The contact owns a 2016 GMC Sierra 1500. The contact stated that her husband remote started the vehicle. The contact stated that when the vehicle was started, the defrosters automatically activated. The vehicle warmed up for approximately 2 to 3 minutes. The contact stated that while leaving the driveway, her husband stopped the vehicle to assist with moving a lawn mower. Upon returning to the vehicle and looking through the glass her husband observed that there was smoke coming from the rear glass. The contact stated that her husband unlocked the rear doors and released the folding rear seat and saw that the defroster unit was on fire and smoking. The contact stated that her husband turned the vehicle off and the flames were self-extinguished; however, approximately 45-seconds later the driver’s side rear panel window shattered. The vehicle was not taken to a local dealer or independent mechanic to be diagnosed or repaired. The contact researched online and related the failure to Customer Satisfaction Program Number: N192265660 - Rear Window Defroster Thermal Events (Electrical System, Visibility). The manufacturer was informed of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 89,000.