2026 GMC YUKON Complaints

My engine with less than 5,000 miles died (engine was blown). While driving on highway engine died and wheels locked and almost caused a major accident. I had to get a tow and bill cost me 700.00. GMC is giving me the run around. Dealer stated that engine will need to be replaced. GMC is doing nothing to assist me, I have a car note with no truck GMC is the biggest scam.

The contact owns a 2026 GMC Yukon. The contact stated that while driving at 65 MPH the engine seized. All the warning lights illuminated after the failure. The vehicle was towed to the local dealer, where it was diagnosed that an engine replacement was needed. The vehicle was not repaired due to the part being backordered. The manufacturer was not contacted. The failure mileage was approximately 10,000.

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.

My 2026 GMC Yukon AT4 (VIN [XXX] ) has a manufacturing defect in the second-row driver-side captain's chair. The C-clamp / latch mechanism that secures the seat to the floor was depressed (partially released position) at delivery on [XXX]. I was able to manipulate the latch enough to work but the release trigger then would not depress to release the seat back from a tumble position. My [XXX] daughter's car seat usually sits in this seat. This is safety-critical for two reasons. First, the second-row captain's chair is the anchored platform for my child's car seat. A seat not fully and correctly latched to the floor compromises the LATCH and tether load path that every car-seat manufacturer's certified installation depends on. Second, a captain's chair that will not fold or tumble blocks emergency egress for third-row occupants in a crash, fire, or rollover, and blocks rescue access to a trapped child in the second row. This appears to implicate FMVSS 207 (Seating Systems) and FMVSS 225 (Child Restraint Anchorage Systems). The vehicle is approximately 16 weeks old and was sold to me with this defect present from delivery. This is one of two manufacturing safety defects on this vehicle within thirty days; the other is a spontaneously shattered panoramic moonroof (NHTSA #11738557) on [XXX] in Mississippi, filed separately. Both defects involve the same area — directly above and at the seating position where my [XXX] daughter rides daily. The vehicle is at the dealer awaiting parts (moonroof on back order to ~June 1, 2026; over six weeks out of service). I urge NHTSA to track this complaint and similar reports on the 2025-2026 full-size SUV platform for consideration of a defect investigation. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While operating my 2026 GMC Yukon AT4 (VIN [XXX] ) on [XXX] Pelahatchie, Mississippi, the panoramic moonroof spontaneously shattered at highway speed. No impact, no debris strike, no external cause. The failure produced a violent report and showered tempered glass into the cabin, forcing an emergency stop on the shoulder during heavy commercial truck traffic — a serious secondary-collision risk caused directly by the failure. I spent hours roadside clearing glass and duct-taping the open roof aperture to make the vehicle minimally drivable. Nighttime wind forced an unplanned overnight stay in north Alabama before a multi-hundred-mile drive back to Washington, DC with the vehicle compromised. In DC, I was forced to park the visibly compromised vehicle in a high-foot-traffic area with work valuables that could not be removed, then drive 20 miles to the dealer in heavy rain the next morning — exposing cabin, electrical systems, child seating positions, and headliner to water intrusion. The shattered glass fell directly above the second-row positions where my [XXX] and [XXX] daughters ride daily. They were not present. Had they been, close-range tempered glass would have created serious risk of injury to face, eyes, and airway, plus driver-distraction crash risk at highway speed. The vehicle is approximately [XXX] weeks old. This is the second manufacturing safety defect in under one month — the first a second-row driver-side captain's chair latch defect, filed separately. Replacement moonroof glass is on national back order until ~June 1, 2026; the vehicle will be out of service over six weeks. NHTSA's 2017-2021 panoramic sunroof investigation closed without action despite thousands of similar complaints. The pattern continues into the 2026 model year on GM's flagship full-size SUV. I urge NHTSA to track this and similar reports across the 2025-2026 Yukon, Tahoe, Suburban, and Escalade for a defect investigation. GM Case #[XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(

The contact owns a 2026 GMC Yukon. The contact stated that the vehicle was purchased, the contact stated that, because of the open recall, the vehicle was not released to the contact. The contact referenced the open recall, NHTSA Campaign Number: 26V304000 (Wheels) however the parts were unavailable. The dealer informed the contact that the parts were unavailable. The manufacturer was not contacted. The contact had not experienced any failure.

The vehicle experienced repeated failures involving the Electronic Stability Control (ESC), Traction Control System, and Check Engine system. Warning indicators for the ESC, traction control, and check engine illuminated while operating the vehicle. The issue has occurred on two separate occasions. The first incident occurred on May 4, 2026. The vehicle was taken to the dealership for inspection and repair, and the dealership advised that the issue had been corrected. However, the same problem reoccurred on May 7, 2026. The vehicle has been inspected by the dealership service department, and the malfunction was confirmed. The affected components and vehicle are available for inspection upon request. The failure created a significant safety concern because the ESC and traction control systems are critical safety features designed to assist with vehicle stability, traction, and driver control, particularly during emergency maneuvers or adverse road conditions. The warning indicators raised concerns that the vehicle could unexpectedly lose stability assistance, traction management, or engine performance while driving. This placed the driver and others at risk because the vehicle’s ability to respond safely during normal or emergency driving conditions could have been compromised. The repeated recurrence of the issue, even after dealership repair attempts, raises concern regarding the reliability and effectiveness of the corrective action performed.

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.