2026 GMC YUKON XL Complaints

Car Engine stopped , shut down on I 475 South Macon GA at 70 mph in left lane. Had to coast to right shoulder. Towed to Hutchinson GMC in Macon GA and it was determined the Engine had locked up. 2026 with 4200 miles, Purchased January 2nd 2026.

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.

On 3/14/26, on I-75 in Troy, Michigan at 70mph the vehicle, with 4000k miles on the odometer completely shut off. I pushed to restart the engine and it would not restart. My whole family was in the car and we were on a curve. I was able to coast to a flat shoulder. The vehicle would not restart or shift out of park. OnStar took seven hours to tow the vehicle. The dealer is installing a new L87 6.2L engine. I do not have the vehicle back yet. I received an economy car as a loaner. The dealer says GM will not extend the factory warranty despite the engine replacement. My family could have been easily killed.

I was on the Highway and had the vehicle on cruise control, the super cruise was not available the entire trip. Suddenly a warning came on saying that supper cruise was not available please take the wheel, the truck started slowing down drastically while I’m doing 70mph which is the speed limit. I put my foot on the brake to disengage the cruise control but that did not work. I had to push the cancel button on the wheel to take it off. This has happened to me twice while on the highway.

In the 2026 Yukons, almost all physical buttons have been replaced by the giant center touchscreen. When starting my vehicle, about a third of the time the screen will not come on, and can’t be turned back on by any means. It will randomly come back on after a few more trips/restarts. This renders several critical systems inoperable. All HVAC does not work, defrosters aren’t available, back up cameras and parking assist is not available, and control of any navigation functions or options (ie heated/cooled seats) are not possible. There are no physical buttons for these items, so there are no other options. Voice commands do not function properly when the screen is black, so no option there. After my third visit to the dealership and an open case with GM, they are finally authorizing a screen replacement. We will see if this fixes it. However, my previous explanations from GM pointed to a nebulous future software release, with no date or detail.

2026 GMC Yukon XL Denali, VIN [XXX] , 6.2L V8 L87 engine. At 3,168 miles, vehicle developed rough idle and knocking noise. Delivered to Sewell Buick GMC Dallas on 3/2/26. Dealer diagnosed crankshaft thrust bearing spun. Tech pinpointed bottom-end noise via stethoscope, found excessive metal debris in oil and oil filter. Engine teardown confirmed thrust bearing failure. Required complete engine replacement (GM #xxx), plus oil cooler/radiator, oil cooler lines, torque converter bolts, and all one-time-use parts due to metal contamination. Old engine serial [XXX] , new engine [XXX] . Repaired under warranty 3/9/26, RO #XXX. This is the identical failure mode that caused NHTSA Recall 25V-274 covering ~597,630 L87-equipped vehicles (MY 2021-2024). GM stated manufacturing improvements were completed by 6/1/24 and 2025+ models were not affected. My 2026 model year failure directly contradicts this claim and suggests the defect persists in current production. SAFETY CONCERN: Bearing failure causes sudden complete loss of propulsion at any speed. NHTSA investigation PE25001 notes most failures occur without warning. Loss of power at highway speed creates serious crash risk due to loss of ability to accelerate and reduced power braking/steering. Had this failure progressed further while driving with my family, consequences could have been severe. No crash or injury occurred in this instance. This 2026 model year failure indicates NHTSA's investigation scope should expand to include current production vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Engine lost power, making noises that sounded like an exhaust leak. Had vehicle towed to dealership. Advised the next day the main bearing had failed and engine needed to be replaced.

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.

On [XXX], I was driving on the highway with my family in the vehicle and the check engine light came on, then it started running roughly. I headed off the highway on an exit ramp and the engine died about halfway down the ramp. It wouldn't restart after that. This happened about an hour away from my house in Painesville, OH. I live in Erie, PA. I had to tow it to the nearest GMC dealer. They've since concluded that the engine failed and have ordered a replacement engine from GMC. The yukon only had about 4,900 miles on it. GMC has claimed that their engine problems were fixed for the 2025 and 2026 model years, or else I would not have purchased this vehicle. Obviously there are still major issues and the 2026 6.2L engines need to be recalled. I understand that there is an ongoing investigation into these issues: RQ26001. Please see that the investigators are made aware of this incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I am submitting this complaint to report a safety defect involving a 2026 GMC Yukon XL AT4 equipped with the GM Brembo brake upgrade. The vehicle is sold as equipped with a full-size spare tire; however, the spare tire/wheel supplied cannot be mounted due to interference from the brake calipers. This incompatibility was discovered only after a flat tire event on [XXX], during which the vehicle could not be safely returned to service. The Brembo brake upgrade is a GM-designed option that is installed by the dealer in all cases. Despite this, the vehicle was delivered with emergency equipment that is unusable in the event of a flat tire. GM has acknowledged the incompatibility and relies on a warning label placed beneath the vehicle, rather than providing a compatible spare or disclosure at the point of sale. This defect resulted in a prolonged roadside emergency involving an elderly passenger and a failure of manufacturer-provided roadside assistance. I believe this condition affects all vehicles equipped with the Brembo brake upgrade and represents a systemic safety issue involving emergency preparedness and disclosure. Supporting documentation and a detailed incident narrative are available upon request. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)