2026 GMC YUKON XL Complaints

Purchased brand new vehicle 2026 XL Denali, hadn’t even had my first oil change, and had a complete engine failure in the middle of the road. Prior to engine failure, car ran fine without an issue - so failure came out of nowhere. Towed, where GMC and dealer determined entire engine needed to be replaced. GMC did cover and dealer did install a new engine. However: 1. I was out of a vehicle for almost a month. 2. I have incurred a depreciation cost of 10-15% on my vehicle due to this problem. 3. I have lost confidence in my brand new vehicle, as GMC has not fixed the reoccurring engine problems from previous years - despite promises to the contrary.

Vehicle has 2200 miles, equipped with the Diesel engine and failed at a red light. GM has to install a new engine.

Vehicle engine stopped working at 5200 miles. Was driving on highway and immediately stopped. Vehicle would not start. Towed to dealership and next day dealer confirmed that the engine needed to be replaced.

The Infotainment screen which controls the A/C, heating, defrost, cameras and all other info for the vehicle does not come on in th vehicle. This began happening after owning the vehicle for 3 days. After taking to the dealer, Delray GMC, we were informed by the service personnel on our second trip in for the recurring problem that General Motors knows this is a problem and are selling the vehicles with this factory engineering design defect and currently there is no repair. Living in Florida this is a problem in the extreme heat with no A/C, being from Illinois, when we return this will be a serious problem, Not knowing if we will or will not have access to heat, cannot control the temperature or the defrost on the vehicle and having a infotainment center that is non functional. We consider this a hazard to our safety and feel that GM is fraudulently selling consumers defective vehicles knowing this may be a safety hazard.

The contact owns a 2026 GMC Yukon XL. The contact stated that while starting the vehicle, there was an abnormal sound coming from the engine. The abnormal sound disappeared after the engine had warmed up. No warning lights were illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine had failed and needed to be replaced. The vehicle remained at the dealer unrepaired. The manufacturer was not notified of the failure. The failure mileage was approximately 3,500.

This issue affects all vehicles in the GMC lineup. The forward collision alert system is so sensitive that it gives false positives constantly which causes 2 major safety issues with the vehicle. First is that it brakes without warning and when completely unnecessary. The 2nd is that vehicles like mine with a heads up display, have the entire display flash a very bright yellow blocking the field of vision to the front of the vehicle. The system is not able to be disengaged permanently and can cause rear end collisions by braking when no obstacle exists and blocks the ability to see in front of you via the heads up display warning.