Consumer Safety Complaints

Incident date: Sep 10, 2026

I own a 2021 GMC Yukon XL Denali equipped with the 6.2L L87 V8 engine. On September 10, 2026, we checked the engine oil and discovered that it was approximately two-thirds low. Mechanical inspection confirmed that the engine is consuming and burning oil internally rather than losing it through an external leak. The vehicle’s last oil change was performed in May 2026, and it is still more than 1... Read more

Incident date: Sep 10, 2026

Truck rear wheels locked up while going between 45 - 50 mph nearly causing accident. Driver behind me had to lock-up their breaks to avoid collision. This is happening every time I drive the truck for more than 30 minutes. It is happening multiple times a day now. I cannot drive truck - too unsafe to drive. Tried getting serviced, but local GMC dealer said they are backed up with truck transmis... Read more

Incident date: Sep 10, 2026

Power steering seems to be lost for a second or two at low speeds turning. Happens multiple times a day.

Incident date: Sep 10, 2026

Power steering seems to be lost for a second or two at low speeds turning. Happens multiple times a day.

Incident date: Sep 10, 2026

Power steering seems to be lost for a second or two at low speeds turning. Happens multiple times a day.

Incident date: Mar 22, 2026

While driving on the highway, i went to pass someone and there was a big shutter in the engine and then a load ticking noise from the engine after. All of the lights came on and the vehicle was running rough

Incident date: Apr 16, 2026

Had a valve body failure in mid XXX. The vehicle would not go into reverse and drove it in limp mode to a dealership about 5 miles away. Fortunately they were able to get a new valve body and repair it in one day. Cost was approximately $3,500 and not covered by warranty. The vehicle had about 110,000 miles on it at the time. This is a known defect on this vehicle and a recall should be initiated.... Read more

Incident date: Sep 10, 2026

The engine coolant control valve on my 2021 GMC Sierra 3.0L Duramax diesel failed. This specific component failure triggers an active vehicle 'No-Restart' safety event during automatic engine stop/start operations (per GM Service Bulletin #24-NA-070). This condition can suddenly prevent the vehicle from restarting when stopped at intersections or in active traffic, creating an immediate highway sa... Read more

Incident date: Sep 1, 2026

Purchased above listed vehicle new in September of 2023. Immediately noticed a 'coolant' smell in cab. brought vehicle in for coolant smell issue on 12/06/23, 01/10/24, 01/16/24 and 01/23/24. We were told that there was no issue until finally on 01/23/24 we were told the radiator needed to be replaced at OUR expense. September of 25 we received a letter from GMC advising the "engine coolant cont... Read more

Incident date: Sep 1, 2026

Purchased above listed vehicle new in September of 2023. Immediately noticed a 'coolant' smell in cab. brought vehicle in for coolant smell issue on 12/06/23, 01/10/24, 01/16/24 and 01/23/24. We were told that there was no issue until finally on 01/23/24 we were told the radiator needed to be replaced at OUR expense. September of 25 we received a letter from GMC advising the "engine coolant cont... Read more

Incident date: Aug 17, 2026

This vehicle has water intrusion for the power steering harness. The system went out one day. Vehicle has 40K miles on it. i bought it less than a year ago as a used vehicle with 30K miles on it. Less than a year later i end up with a $6,500 bill for it.

Incident date: Aug 17, 2026

This vehicle has water intrusion for the power steering harness. The system went out one day. Vehicle has 40K miles on it. i bought it less than a year ago as a used vehicle with 30K miles on it. Less than a year later i end up with a $6,500 bill for it.

Incident date: Aug 17, 2026

This vehicle has water intrusion for the power steering harness. The system went out one day. Vehicle has 40K miles on it. i bought it less than a year ago as a used vehicle with 30K miles on it. Less than a year later i end up with a $6,500 bill for it.

Incident date: Sep 4, 2026

I purchased said vehicle with a little over 76,000 miles on XXX from NW Chevrolet, [XXX]. Dealership service the engine on XXX and remained on their lot until it was sold. While driving home, I smelled gas fumes coming into the cabin and the engine was misfiring causing slight hesitation in motor acceleration while adjusting to speed limits and climbing hills. I told management at the dealership a... Read more

Incident date: Jun 14, 2026

Engine stop working, lots of black smokes through the exhausts and vibrating weird. Lifters failed amoung other parts and they deemed the engine bad so they replaced it with a new one. The new engine started to make the same weird noises.

Incident date: Sep 7, 2026

While driving my 2020 GMC Acadia SLT AWD Turbo with my young daughters in the vehicle, the brake pedal suddenly and sporadically lost all hydraulic pressure and sank nearly all the way to the floorboard. The vehicle would only gradually roll to a slow stop. Simultaneously, the dashboard illuminated with ABS and Service ESC notifications. After turning the vehicle completely off and restarting it, ... Read more

Incident date: Sep 9, 2026

Update to original claim filed 11760897. Dealership inspected on 9/9/2026 and found engine damage severe enough to warrant a complete replacement. Catastrophic damage. Unspecified what caused the damage, but service advisor made me aware of a deep gash along the cylinder wall after removing the cylinder heads, unspecified cylinder. Likely from cylinder 3 where the code was being displayed- P0303... Read more

Incident date: Sep 8, 2026

On 9/08/2026 I was driving and almost got a wreck but I was able to get out and was going less the 25 and lost control of the vehicle and barely hit the curb and the two air bags went off and I was sent to the hospital

Crash

Incident date: Jul 15, 2026

The car lost all engine power on the interstate of I10. Leaving me without power, barely able to get to the side of the road. Warning only when lost engine power on the highway. Cannot be driven.

Incident date: Sep 2, 2026

I am writing to formally log a safety concern regarding my vehicle’s 6.2L L87 engine, specifically in relation to the known defects under NHTSA’s ongoing Engineering Analysis EA25007. The engine seized up while driving in traffic which has a safety impact on the occupants and other drivers. The vehicle was towed to GM and the they noted the the engine has catastrophic internal failure with l... Read more

Incident date: Aug 18, 2026

My 2021 GMC Yukon XL Denali with the 6.2L L87 V8 has experienced two significant lifter/valvetrain failures. The first occurred at approximately 6,500 miles and was repaired by a GMC dealer. That failure involved cylinder #4, including a collapsed/stuck lifter and bent pushrod. The current failure occurred at approximately 110,269 miles. The vehicle initially operated normally. While traveling a... Read more

Incident date: Jul 23, 2026

I was involved in a company car wreck on July 23 2026 I got hurt the airbags didn't deploy at all

Crash 1 injured

Incident date: Sep 9, 2026

When updating the vehicle as prompted by the entrainment system the next day when attempting to start the vehicle it did not start. Vehicle had to be jumped then 6 warning lights came on and disappeared shortly after driving.

Incident date: Sep 9, 2026

When updating the vehicle as prompted by the entrainment system the next day when attempting to start the vehicle it did not start. Vehicle had to be jumped then 6 warning lights came on and disappeared shortly after driving.

Incident date: Aug 29, 2026

After numerous attempts getting GM to finally look at why my vehicle because after the L87 engine swap, which failed after the Pico test and oil, oil filter, and oil cap change my truck has been dangerous to drive. It falls on its face when taking off or driving. It acts as if something is holding the truck back. It takes more throttle to get it moving. Then in traffic while moving it randomly lun... Read more

Incident date: Aug 29, 2026

After numerous attempts getting GM to finally look at why my vehicle because after the L87 engine swap, which failed after the Pico test and oil, oil filter, and oil cap change my truck has been dangerous to drive. It falls on its face when taking off or driving. It acts as if something is holding the truck back. It takes more throttle to get it moving. Then in traffic while moving it randomly lun... Read more

Incident date: Aug 29, 2026

After numerous attempts getting GM to finally look at why my vehicle because after the L87 engine swap, which failed after the Pico test and oil, oil filter, and oil cap change my truck has been dangerous to drive. It falls on its face when taking off or driving. It acts as if something is holding the truck back. It takes more throttle to get it moving. Then in traffic while moving it randomly lun... Read more

Incident date: Sep 9, 2026

The front left frame that the wheel and suspension bolt onto is in advanced rust stages. It is being considered unsafe to drive although the right side is still considered safe. Common issue from what I have heard. Took car in to replace the starter and shop doesnwant to work on it. We cannot afford a new vehicle because of a knkwn weakness in the frame work

Incident date: Sep 8, 2026

Catastrophic engine failure at 77357 miles. I went to the local GM dealer and my VIN is not in the L87 engine recall. Not sure how to repair my truck , but feel like the engine should not have locked up with such low miles, and I done constant engine maintenance , meaning oil changes every 5K miles.

Incident date: Jul 19, 2026

2024 Yukon XL 6.2L V8 following a complete engine failure at 37,446 miles and the significant safety incident that resulted. On XXX, while traveling from [XXX] to [XXX] on [XXX], the vehicle suddenly lost acceleration while traveling at 65mph on a 2 lane HWY, displayed a Low Oil Pressure warning, developed loud knocking and ticking noises, and became inoperable. We were forced to drift to a stop i... Read more

Incident date: Jan 9, 2026

Computer screen is black 90% of the time. During this vehicle has no back up cameras, no control of air conditioning, no control of heat or defrost, no heated seats, no mapping system, no vehicle safety display of tire pressure, oil life, brake life, no ability to control radio. These features cannot be turned on with manual push buttons as they are controlled thru the computer screen. 2 complaint... Read more

Incident date: Jun 26, 2026

The contact owns a 2023 GMC Yukon XL. The contact stated that while driving 70 MPH, the vehicle stalled, and the engine seized. There was no warning light illuminated. The vehicle was coasted to the side of the road. The vehicle failed to restart and 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 ... Read more

Incident date: Jul 16, 2026

The contact owns a 2026 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle hesitated to maintain automotive power and was a potential safety risk for his wife and children. The message "Shift to Park and Restart Vehicle” was displayed. The vehicle was shifted into park(P) and back into drive(D) as a temporary fix. The vehicle was taken to a local dealer on seve... Read more

Incident date: Sep 3, 2026

Lifters and camshaft failure, loud clanking, & sudden power loss on the 6.2 motor are the first noticeable signs. Instantly when everything happened check engine light, cruise control, & stabilizer lights flashed. The sudden loss of power forced the vehicle to suddenly slow down forcing my camper into the truck. I was hauling a within weight standerd camper but had difficulty bringing both the tr... Read more

Incident date: Sep 3, 2026

Lifters and camshaft failure, loud clanking, & sudden power loss on the 6.2 motor are the first noticeable signs. Instantly when everything happened check engine light, cruise control, & stabilizer lights flashed. The sudden loss of power forced the vehicle to suddenly slow down forcing my camper into the truck. I was hauling a within weight standerd camper but had difficulty bringing both the tr... Read more

Incident date: Sep 3, 2026

Lifters and camshaft failure, loud clanking, & sudden power loss on the 6.2 motor are the first noticeable signs. Instantly when everything happened check engine light, cruise control, & stabilizer lights flashed. The sudden loss of power forced the vehicle to suddenly slow down forcing my camper into the truck. I was hauling a within weight standerd camper but had difficulty bringing both the tr... Read more

Incident date: Sep 1, 2026

Catastrophic Engine Failure due to Lifter Failure at approximately 51,000 miles driven. This has been confirmed by the dealership and reported/escalated to General Motors. The truck is at the dealership for repairs. General Motors offered to cover 65% of the repair as a Goodwill sign. As the 60K powertrain warranty had expired. This truck has the same components that are covered under the recal... Read more

Incident date: Jul 9, 2026

air bags on my truck still dont work and i was not told by sales person that the safety features didnt work on truck before purchase. Dealership has worked on it twice and the last tech airbags were working and they are not still same symbol saying airbag not working

Incident date: Jul 9, 2026

air bags on my truck still dont work and i was not told by sales person that the safety features didnt work on truck before purchase. Dealership has worked on it twice and the last tech airbags were working and they are not still same symbol saying airbag not working

Incident date: Jul 9, 2026

air bags on my truck still dont work and i was not told by sales person that the safety features didnt work on truck before purchase. Dealership has worked on it twice and the last tech airbags were working and they are not still same symbol saying airbag not working

Incident date: Nov 16, 2025

While driving on a divided two lane state highway at approximately 60mph my vehicle suffered a catastrophic engine failure causing immediate loss of power in traffic at highway speeds. I had to negotiate highway traffic to steer the vehicle onto a narrow shoulder and continue under reduced power to a location where the vehicle could remain stopped safely. There were no warning signs and no warning... Read more

Incident date: Nov 16, 2025

While driving on a divided two lane state highway at approximately 60mph my vehicle suffered a catastrophic engine failure causing immediate loss of power in traffic at highway speeds. I had to negotiate highway traffic to steer the vehicle onto a narrow shoulder and continue under reduced power to a location where the vehicle could remain stopped safely. There were no warning signs and no warning... Read more

Incident date: Aug 24, 2026

I think it is a transmission type of failure. I'm not sure of the exact mechanical specifics. While putting the vehicle in reverse, driving and or accelerating it feels like the transmission is locking up and then releasing, and then locking up again. It felt very dangerous for that to happen while driving down the road. I took the vehicle to a local mechanic that was near by for assistance and... Read more

Incident date: Aug 24, 2026

I think it is a transmission type of failure. I'm not sure of the exact mechanical specifics. While putting the vehicle in reverse, driving and or accelerating it feels like the transmission is locking up and then releasing, and then locking up again. It felt very dangerous for that to happen while driving down the road. I took the vehicle to a local mechanic that was near by for assistance and... Read more

Incident date: Aug 24, 2026

I think it is a transmission type of failure. I'm not sure of the exact mechanical specifics. While putting the vehicle in reverse, driving and or accelerating it feels like the transmission is locking up and then releasing, and then locking up again. It felt very dangerous for that to happen while driving down the road. I took the vehicle to a local mechanic that was near by for assistance and... Read more

Incident date: Sep 8, 2026

Engine I believe The truck died while I was doing 78 MPH on the highway Dashboard stated “shift into neutral and press start” I pulled to the side of the road and did what it stated and it would not crank over. I also put it in park turned the vehicle off and back on to try to start it. The lights on the dashboard, all gauges, the AC, and everything works the truck just will not crank over.... Read more

Incident date: Feb 23, 2026

A GM warranty engine replacement was performed at Heyward Allen GMC in [XXX] on XXX at 70,415 miles. We purchase the vehicle on XXX with 73,904 miles and after driving for a month started having multiple malfunction indicator lights displaying, and experienced a no start condition. We took the vehicle to the Don Ledford GMC dealer in [XXX], and they performed a high level inspection. They found ... Read more

Incident date: Feb 23, 2026

A GM warranty engine replacement was performed at Heyward Allen GMC in [XXX] on XXX at 70,415 miles. We purchase the vehicle on XXX with 73,904 miles and after driving for a month started having multiple malfunction indicator lights displaying, and experienced a no start condition. We took the vehicle to the Don Ledford GMC dealer in [XXX], and they performed a high level inspection. They found ... Read more

Incident date: Feb 23, 2026

A GM warranty engine replacement was performed at Heyward Allen GMC in [XXX] on XXX at 70,415 miles. We purchase the vehicle on XXX with 73,904 miles and after driving for a month started having multiple malfunction indicator lights displaying, and experienced a no start condition. We took the vehicle to the Don Ledford GMC dealer in [XXX], and they performed a high level inspection. They found ... Read more

Incident date: Sep 9, 2026

I’ve included all my repair orders regarding to coolant smell/leak and transmission shutter. I purchased my truck on XXX. We had planned a family vacation to [XXX], and we were driving up when I felt the transmission shutter at around 3:00 to 5:00 p.m. while cruising at approximately 55 to 62 mph. Since then, I’ve noticed it happening more frequently. I took the truck to GMC dealer Jack Hanai... Read more

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