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Electrical System, engine, fuel/propulsion System
12/12/2025
The car just died while going 55mph on the highway. Complete shutdown but luckily both the steering and brakes worked. After stopping it wouldn’t start again. I had my three children in the car aged [XXX], [XXX], and [XXX]. It was a horrific experience. GMC did some repairs to the engine that took over two months and then the car had a few more warnings pop up just a few weeks later. GMC now says there is a misfiring in one of the positions. I’m terrified of driving this car with my children as I don’t know when it will shut off again and how bad it will be! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
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Fuel/propulsion System
07/14/2026
On July 14, 2026, I experienced a serious fuel system failure with my 2023 GMC Denali. That morning, I filled the vehicle with a little over 20 gallons of fuel at a gas station approximately two miles from my home. Later in the day, I made a short trip to my neighborhood swimming pool, roughly 1.5 miles round trip, with no unusual noises or warnings from the vehicle. Approximately two hours after returning home, I entered the vehicle to run an errand. When I shifted into reverse and began backing out of my carport, I immediately heard a scraping noise on the concrete. I stopped the vehicle and inspected underneath. At that point, I discovered that the entire fuel tank had fallen out of the vehicle and was resting on the ground. I contacted roadside assistance, and the vehicle was towed to the dealership. The dealership informed me that the fuel tank support straps were missing, which allowed the tank to detach and fall. I personally searched along all the routes I had driven earlier th...
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Unknown Or Other
07/07/2026
On a long trip the fuel tank straps and bolts holding the gas tank failed causing the fuel tank to fall and be dragged causing massive fuel spill. The problem has been confirmed by the dealer. The part was not inspected by police. However, we did get pictures of the tank at the scene. No warning lanmps or sfty signals were
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Engine, forward Collision Avoidance
03/30/2026
The contact owns a 2023 GMC Yukon. The contact stated that while driving at an undisclosed speed, the engine seized. No warning lights were illuminated. The vehicle was towed to the dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was repaired. The contact was informed that the repair was covered under an unknown recall repair. The vehicle was released back to the owner; however, the failure reoccurred. The contact stated that the vehicle was idling roughly and jerking abnormally. In addition, the contact stated that the drive to the residence was not a smooth drive. The vehicle was taken back to the dealer, where a technician performed a ride-along. The contact stated that the engine seized three times during the ride along. The contact was informed that the engine needed to be replaced a second time. The contact stated that when the vehicle was released, the rear bumper was damaged. Additionally, while attemptin...
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Power Train, electrical System, engine
07/09/2026
While driving about 70 mph in the express lanes, the vehicle suddenly lost power and drifted like it went into neutral. There were no warning symbols. The vehicle could not restart even while coasting. After stopping, it locked itself in park and would not shift out of park. My family and I were trapped on the express lanes for over an hour in a dangerous location. The vehicle stayed stuck in park even on the tow truck. The dealer confirmed metal in the oil filter, a blown main fuse, and knocking when starting. The recall inspection and remedy were already done, but the failure still happened. The vehicle is undriveable and the required recall repair cannot be completed because the replacement engine is on backorder with no ETA.