On October 10, 2026, at approximately 5,200 miles, our 2026 GMC Yukon Denali XL equipped with the 6.2-liter V8 developed a sudden, severe abnormal engine noise. The servicing dealership subsequently advised us that the engine had suffered a rod-bearing failure and required engine replacement. The service manager stated that the failed engine would be returned to General Motors and that the dealership could not determine the full extent of the internal damage. We have not received a confirmed explanation of the underlying cause. The vehicle has remained out of service since the incident. We were subsequently told that a replacement engine had shipped, but we have not received confirmation that repairs are complete. We are reporting this premature internal engine failure for the federal safety agency’s review as a potential safety defect.
2026 GMC Yukon XL: engine failure
22 of the 41 complaints about the 2026 GMC Yukon XL describe engine failure.
- owner complaints
- 22
- of this car's complaints
- 54%
- recalls
- 0
Engine failure by model year
What owners say
We own 2026 GMC Yukon XL Denali with 6.2L V8 engine with just under 4600 miles. On Monday October 19, 2026 while driving the engine seized up. It is at dealer and the are replacing the engine, radiator and about 65 other parts under hood. We do have a very short phone video of the noise it made right as it seized up!! We heard about investigation ongoing and wanted to help.
Truck has shuttered, rough idle since May 2026 after purchased new March 2026. We have been to two different GMC dealers who cannot duplicate the problem. Last week the truck started to shutter regularly after highway travel. When coming to a stop in traffic, the truck shutters to kill, loses power, RPMs drop below 500 and then recovers to a rough idle. Last evening Oct 20,2026 while driving the engine light came on, vehicle computer stated “ Issue with Engine / Transmission System Schedule service now.” This is the third time the vehicle will be at the GM dealer for diagnosis. Two times previous, dealer stated “unable to duplicate customer’s complaint.” We have owned this 2026 GMC truck for 8 months, purchased new and have nothing but issues which no GM dealer seems to be aware of nor can duplicate. This vehicle is unreliable and now has sat out of service awaiting a diagnosis for over 15 days at two different dealers. We have opened our second case with GMC Customer Care’s with zero assistance. It is the duty of a manufacturer to provide consumers with a safe and reliable vehicle. My 2026 GMC Yukon Denali is not safe and puts me and my family at risk of engine failure and a potential accident. We have documented every event and have videos of described defective vehicle operation.
While driving there was a noise that started in the engine area. The vehicle was going 55-60 mph at the time it started. It became more and more frequent. The check engine light came on just before the engine completely seized up and lost all power. Dealership is saying there is definitely internal engine noise and engine failure.
Total Engine failure. This is the second time. The vehicle had under 2000 miles when the first engine failure happened and left us sitting on the Turnpike. Very unsafe!! We were assured we received a new "upgraded" engine only to find out GM decided to roll the dice with our lives and the lives of our family (grandchildren) and put another bad engine in our vehicle. I will never feel safe with this vehicle or that they are putting in "new" parts.
What component or system failed or malfunctioned, and is it available for inspection upon request? ""6.2L Engine Failed with 4,785 miles"" How was your safety or the safety of others put at risk? ""Engine Failed in active highway jug handle and required police assistance and vehicle needed to be towed to the dealer."" Has the problem been reproduced or confirmed by a dealer or independent service center? ""The dealer has confirmed that the engine failed and needs to be replaced."" Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? ""At this point only the dealer."" Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?"" No just started sputtering and shout down.""
The contact owns a 2026 GMC Yukon XL Denali. The contact stated that while driving 65 MPH, the engine seized. There was an abnormal burning odor inside the vehicle. The contact stated that the failure had occurred while driving on a busy highway in the middle lane. The local Police arrived and assisted with directing traffic. The vehicle was towed to the dealer, where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was repaired. The contact was informed that the failure was a known failure with the vehicle. The manufacturer was contacted by email and made aware of the failure. The failure mileage was approximately 5,000.
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.
The L87 engine seized and receiving a full engine replacement now
Filing as a proactive data point for the ongoing the federal safety agency Office of Defects Investigation Engineering Analysis (EA26005) regarding GM 6.2L L87 engine failures. Vehicle is a 2026 GMC Yukon XL AT4 equipped with the 6.2L V8 and 10-speed transmission. The vehicle currently has approximately 2,800 miles and operates perfectly with no mechanical symptoms, ticking, or loss of propulsion. As an active preventive measure against internal component contamination, early engine oil changes were performed at 700 miles and 1,700 miles by a certified franchise dealer (Alpine Buick GMC). The engine continues to use the factory-specified 0W-20 oil viscosity. A magnetic oil drain plug has been installed to monitor for premature ferrous bearing and crankshaft debris at future service intervals. This report is submitted to ensure 2026 model year data running 0W-20 oil is officially documented within the federal investigation scope.
Engine blew at 8,762 miles in the middle of the night with 3 small kids in the car. Currently 41 days waiting for a new engine. We were driving and it started making a clapping sound like something was caught underneath. We had to drive a could miles to find a safe place to pull over. If we increased speed, the clapping increased and it slowed when we slowed. Hauled it to the local dealership and they said it was the engine. The dealership it was purchased at says the same thing. There was no warning. After a couple of miles of the clicking/clamping sound, the car started to shake and then died. There were no warnings or light on the dash of any signs of distress until it died. It was a couple of miles before we even had a safe place to pull over on the side of the highway. Going 70mph on a highway that is posted to be 70mph with 3 kids in the car, in the middle of the night, put my family’s life in danger along with other cars behind us. Clearly safety and quality isn’t GM’s top priority. This is our 5th Yukon. Our 13th General Motors vehicle. To say we are disappointed is an understatement when we have been devoted to GM for over a decade.
I purchased my vehicle from GMC on April 13th and had approximately 4,500 miles on it. It was sold as new and drove it for about a week at 4,994 miles on the highway. During this time, it shifted from drive to neutral , but the vehicle was towed back to the dealership. Upon inspection, it was diagnosed with a seized engine.
Service bulletins that may apply
Related recalls
No recalls on record for this model year.
Questions about the 2026 GMC Yukon XL engine failure
Is engine failure a common problem on the 2026 GMC Yukon XL?
22 of 41 owner complaints about the 2026 GMC Yukon XL (54%) mention engine failure. The model year with the most reports is 2023.
Is there a recall or service bulletin for this on the 2026 GMC Yukon XL?
There are 0 recalls and 2 service bulletins for the same area of the car. Check them below with your VIN.
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