2026 GMC Yukon: engine failure

Filed Nov 9, 2026 · Engine · NC

My 2026 GMC Yukon Denali Ultimate with the 6.2L V8 had a major engine failure on November 2, 2026, while driving with only 3,668 miles on it. I bought it brand new in July. The dealership told me it was likely a rod or rod bearing failure and found metal in the oil. The entire engine has to be replaced. This is a serious safety concern, especially if the engine fails while driving at highway speeds. A brand-new vehicle should not have a catastrophic engine failure with less than 4,000 miles. I’m concerned other 2026 Yukons with the 6.2L engine could have the same issue.

Filed Nov 6, 2026 · Transmission · VA

Dealer performed oil change on 10/14/26 @ 11521 miles. We stated at time of oil change that we were experiencing shuttering at 1200-1500 rpm' and was hearing knocking sounds from engine. Advisor stated that they will change oil and test drive vehicle and check for codes. It is noted on diagnostic report that oil was changed, test drove vehicle 5 miles and all ok at this time. Vehicle was released back to us to drive without any further investigation to the symptoms that we noticed. Advisor requested that we make an appointment with the transmission division. Appt. made with transmission group for 10/26/26. On 10/25/26 Engine light came on. At the 10/26/26 appt., code P0016 was noted @ 11862 miles and we were called to say that we needed a new engine. Advisor also stated verbally that there were metal shards in the oil. Dealer offered good will assistance and denied the powertrain warranty based on Owner Neglect. Spoke to GM assistance and they are still denying warranty replacement of said engine. General Manager stated that we should request an engine tear down.

Filed Nov 2, 2026 · Engine · GA

Car with $13000 miles had sudden engine failure. Have heard numerous other new Yukons have had this issue.

Filed Oct 30, 2026 · Engine · NJ

Engine Failure. While driving on the highway at a speed of approximately 70 mph the engine made a noise and the vehicle lost power. The safety factor is that i was on the highway with trucks and busses in which i had to coast the vehicle to the shoulder of the road and call for police assistance. No warning lamps. Vehicle was towed and inspected by the dealer in which i was informed that the engine bearings had locked up. The vehicle needed a new engine.

Filed Oct 16, 2026 · Engine · NY

Was operating Yukon on st route 5 doing 55mph when the Yukons engine blew up and the vehicle shut down on me in the middle of the road.

Filed Sep 30, 2026 · Engine · FL

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.

Filed Sep 29, 2026 · Engine, Transmission · WA

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 replaced. The engine was replaced and I picked up my car on 8/17/2026. The check engine light came on again on 8/20/2026 and after three trips to the dealership, my catalytic converter was replaced. Since purchasing my car on December 4, 2025, I have taken it back to the dealership 5 times for non-routine services (and once for a routine oil change). Since purchasing a BRAND NEW 2026 GMC Denali (a car that cost over $100,000) less than 10 months ago, I have been without my car for 33 days for manufacturing related issues that are all under warranty. I still don't think the engine issues are fixed (or I have another bad engine). My vehicle sounds metallic at start up (different than it sounded when I purchased the vehicle and different than other 2024-2026 GMC Yukons with the same engine) and idles rougher than it used to. I am nervous driving my car on road trips now, which is one of the primary reasons we purchased the vehicle. I did my research before purchasing this vehicle and based on information from GM, was under the impression that the engine issues plaguing the 2021-2025 engines had been resolved. This issue is still a MAJOR concern and needs to be investigated and remedied before something more catastrophic happens.

Filed Sep 29, 2026 · Engine · FL

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

Filed Sep 12, 2026 · Engine · IN

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.

Filed Sep 2, 2026 · Engine · TX

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 emergency maneuver across multiple lanes to reach the shoulder. Stranded on shoulder at night(pitch black) with lots of 18 wheelers passing.

Filed Aug 29, 2026 · Engine · TN

The engine failed at 5383 miles while driving on remote highway in Nebraska.

Filed Aug 26, 2026 · Engine · 4,700 miles · NE

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 the failure. The vehicle failed to restart. The vehicle was towed to the local dealer, where it was diagnosed with complete engine failure. The contact was informed that the engine needed to be replaced. The vehicle was repaired; however, the contact no longer wanted the vehicle. The manufacturer was contacted and opened a case and escalated the concerns. The failure mileage was approximately 4,700.