2026 GMC Yukon engine problems

Related recalls

No recalls on file.

What owners say

1. Filed Sep 30, 2026FLEngine

   This engine failed while I was driving. You need to speed up the process and make GM know that their 6.2 engines are failing still to this day . People can get in accidents due to this happening. GM needs to be held accountable for their mistakes. I was lucky my vehicle engine failed near my home and not on the interstate. Please get to the bottom of this . There is no reason that these engines are failing in 2026.

   NHTSA complaint #11768184 · source
2. Filed Sep 29, 2026FLEngine

   Engine failed . Stalled in the middle of the road . Engine ran bad . Shaking knocking and trebling. No engine lights on .

   NHTSA complaint #11767887 · source
3. Filed Sep 29, 2026WAEngineTransmission & Drivetrain

   On 7/25/26 (a Saturday), we started to hear a noise in my vehicle and shortly thereafter, were sent a service alert through the GMC app and the check engine light came on. We immediately parked the vehicle and took it to the dealership when they opened on 7/27/2026 (Monday). Later that day, we were informed that my Yukon Denali, with 9,226 miles on it, has metal fragments in the oil caused by some sort of failure in the bottom half of the engine and the engine needs to be…

   NHTSA complaint #11767753 · source
4. Filed Sep 14, 2026MIEngine

   Engine stopped. Would not restart. I had it towed to dealership. They told me the engine is blown. There is only 7700 miles on the truck.

   NHTSA complaint #11764153 · source
5. Filed Sep 12, 2026INEngine

   Engine failed on this 2026 GMC Yukon Denali.. It had only 18000 miles on it, it failed in middle of hwy in Indiana. Got it towed to dealership.. they haven’t touched it since last 2 days.

   NHTSA complaint #11763830 · source
6. Filed Sep 2, 2026TXEngine

   While traveling at highway speeds of approximately 82 mph in a 2026 GMC Yukon Denali (6.2L V8 L87 engine), the engine experienced a sudden, catastrophic internal failure and completely seized without warning. This resulted in an immediate, total loss of motive power, power steering assist, and power braking assist while surrounded by high-speed traffic. The sudden deceleration and lack of vehicle control created an extreme, life-threatening safety hazard, forcing an…

   NHTSA complaint #11761517 · source
7. Filed Aug 31, 2026ALEngine

   -Transmission started to slip when shifting above 2000rpms -Engine light came on and took to dealership -Error code confirmed for valve body, valve #3 failure -New valve body installed after order but also failed as I left the dealership -New valve body currently on order

   NHTSA complaint #11760884 · source
8. Filed Aug 30, 2026TXEngine

   The engine issue was caused by a misfire in cylinder #5, which resulted in white smoke coming from the vehicle’s exhaust. While driving on the highway, the vehicle lost power and would not accelerate properly, creating a serious safety hazard due to the inability to maintain speed and safely respond to traffic conditions.

   NHTSA complaint #11760799 · source
9. Filed Aug 30, 2026TXEngine

   The engine issue was caused by a misfire in cylinder #5, which resulted in white smoke coming from the vehicle’s exhaust. While driving on the highway, the vehicle lost power and would not accelerate properly, creating a serious safety hazard due to the inability to maintain speed and safely respond to traffic conditions.

   NHTSA complaint #11760798 · source
10. Filed Aug 30, 2026TXEngine

    The engine issue was caused by a misfire in cylinder #5, which resulted in white smoke coming from the vehicle’s exhaust. While driving on the highway, the vehicle lost power and would not accelerate properly, creating a serious safety hazard due to the inability to maintain speed and safely respond to traffic conditions.

    NHTSA complaint #11760797 · source
11. Filed Aug 28, 2026NEEngine

    Driving down highway the engine made a squeeling noise. The engine shuttered and kept making noise then said to reduce speed. Then quit running all together.

    NHTSA complaint #11760278 · source
12. Filed Aug 26, 20264,700 miNETowedEngine

    The contact owns a 2026 GMC Yukon. The contact stated that while driving approximately 15-20 MPH and approaching a stop in Nebraska, there was an abnormal sound coming from the vehicle. The vehicle was shaking and vibrating abnormally. The contact called the local dealer, and an appointment was scheduled. The failures persisted while waiting for the appointment. While driving at an undisclosed speed, the vehicle lost motive power and stalled. The driver alerted OnStar about…

    NHTSA complaint #11759661 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology