The contact owned a 2026 GMC Yukon XL. The contact stated that while driving at an undisclosed speed, the vehicle suddenly turned off and lost engine power. There was no warning light illuminated. The vehicle was pulled over to the side of the road and was then towed to an independent mechanic to be diagnosed. The vehicle was diagnosed with engine failure. The manufacturer was notified of the failure. The dealer confirmed the engine failure. The failure mileage was 1,800.

Source: NHTSA complaint ODI #11764137 · view all complaints for this vehicle at nhtsa.gov

Computer screen is black 90% of the time. During this vehicle has no back up cameras, no control of air conditioning, no control of heat or defrost, no heated seats, no mapping system, no vehicle safety display of tire pressure, oil life, brake life, no ability to control radio. These features cannot be turned on with manual push buttons as they are controlled thru the computer screen. 2 complaints to GMC have resulted in them stating they have no fix as it is a software issue. They have refused dealer request to replace the computer. As a [XXX] with health issues, the vehicle has sat parked due to no air conditioning. With NNY winter weather approaching, vehicle is unsafe without heat or defrost. Vehicle was purchased on XXX and problem was immediate. I find it amazing that GMC has had 9 months to resolve and they do not have a single competent software engineer! GMC case #XXX issued on XXX6. Buy back denied as GMC states it does not meet NYS Lemon law because vehicle is drivable. I disagree as I feel it is unsafe. GMC case # XXX opened on XXX. On XXX I was notified by phone from GMC that Tech case was being closed as they have no way of repairing. Again, requested new computer but was immediately denied as they continue to use software excuse. GMC rep. stated it is my responsibility to periodically contact a GMC dealership to see if a repair is available. All GMC correspondence has been by phone as they will not put anything in writing. Meanwhile I have an 80,000 vehicle that I feel is unsafe heading into snow and cold. NYS AG complaint was a waste of time as they determined I should hire an attorney and take GMC to court. I do not want to risk my safety or anyone else on the road. Common sense tells me if my home computer had a blank screen, I would have to replace it! On XXX I left vehicle at NYE GMC in [XXX] for 5 days. They confirmed there is no fix, they confirmed screen is black majority of the time. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Source: NHTSA complaint ODI #11763128 · view all complaints for this vehicle at nhtsa.gov

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.

Source: NHTSA complaint ODI #11696961 · view all complaints for this vehicle at nhtsa.gov

I am submitting supplemental information regarding Complaint #11716907 involving a 2026 GMC Yukon XL AT4 equipped with the Brembo brake package. Following my original submission, GM's Executive Resolution Office provided written clarification of its disclosure position. GM states that the spare tire compatibility limitation associated with the Performance Brake Upgrade is disclosed through a hang tag affixed to the spare tire/wheel assembly mounted beneath the vehicle; and the owner’s manual. GM has not indicated that this limitation appears on the Monroney label, buyer’s order, or delivery documentation. The hang tag provided to me as an example states that the original spare tire/wheel does not fit the front axle when the performance brakes are installed. It instructs that, in the event of a front-axle flat, the consumer must install the spare on a rear wheel position & move a rear wheel to the front axle; and stow the flat tire. The spare tire is mounted underneath the vehicle. The tag is attached to the spare assembly and exposed to road conditions. In my case, when the spare was accessed following a roadside flat tire event, only a small piece of yellow plastic remained. Additionally, no printed owner’s manual is provided at delivery. During my roadside event, the dispatched service provider was unaware of any two-wheel rotation procedure and attempted to install the spare directly on the affected axle. The incompatibility rendered the spare unusable at that time. My concern is that current owners of vehicles equipped with the Performance Brake Upgrade may reasonably assume that a “full-size spare” is compatible with all wheel positions. Unless the undercarriage hang tag remains intact and is specifically read at the time of a flat tire, the incompatibility and required rotation procedure is not apparent. GM has not indicated it intends to notify new or existing owners regarding the spare tire limitation and required rotation procedure.

Source: NHTSA complaint ODI #11721069 · view all complaints for this vehicle at nhtsa.gov

The contact owns a 2026 GMC Yukon XL. The contact stated while parked and occupied in the vehicle or driving at night he can only see out of the bottom of the windshield. a dealer was contacted. The vehicle was taken to the dealer, and they offered no assistance. The vehicle was not repaired. The manufacturer was notified of the failure, and they informed him they will call the dealer to take a look at the vehicle at night. The failure mileage was 150.

Source: NHTSA complaint ODI #11736051 · view all complaints for this vehicle at nhtsa.gov

The shark fin antenna has a plastic cover that is only held on by 4 plastic clips. Hi winds or car wash can compromise the cover by breaking at least two of the plastic clips allowing air to get underneath the cover and then the cover falls off. I consider this a safety issue due to the fact that if your on a highway and it comes off it can crash thru another vehicle’s windshield causing a collision with other vehicles or cause serious injury to the occupants of the vehicle it strikes. I looked online and it seems to be happening to numerous GM vehicles with it falling off.

Source: NHTSA complaint ODI #11762173 · view all complaints for this vehicle at nhtsa.gov