Consumer Safety Complaints

Incident date: Jan 12, 2026

Diesel exhaust fluid tank heater malfunctioned and meted tank and connectors.

Incident date: Jan 12, 2026

Diesel exhaust fluid tank heater malfunctioned and meted tank and connectors.

Incident date: Jan 6, 2026

This has happened twice. Once in November 2025 and then in January 2026. With super cruise engaged while going around a curve super cruse disengages and the steering wheel turns to driving straight. You have about one or two seconds to take control or crash. This happened while driving about 70 mph on interstate I 70 and next on Ohio 122 going about 45 mph. On I 70 it was a gentle curve and on 12... Read more

Incident date: Jan 6, 2026

This has happened twice. Once in November 2025 and then in January 2026. With super cruise engaged while going around a curve super cruse disengages and the steering wheel turns to driving straight. You have about one or two seconds to take control or crash. This happened while driving about 70 mph on interstate I 70 and next on Ohio 122 going about 45 mph. On I 70 it was a gentle curve and on 12... Read more

Incident date: Jan 6, 2026

This has happened twice. Once in November 2025 and then in January 2026. With super cruise engaged while going around a curve super cruse disengages and the steering wheel turns to driving straight. You have about one or two seconds to take control or crash. This happened while driving about 70 mph on interstate I 70 and next on Ohio 122 going about 45 mph. On I 70 it was a gentle curve and on 12... Read more

Incident date: Jan 3, 2026

My vehicle was part of the GM Engine recall. Took it to dealer to see if the vehicle passed, it did. Now, engine has 0w40 oil in it about 1,000 miles later, just at 50,000 miles the truck had a catastrophic engine failure.

Incident date: Nov 21, 2025

There have been several issues for which I had to take my vehicle to the dealer. I did the engine oil recall. Then 4 months later my engine was destroyed. I’ve had several issues with oil leaks. I had an issue with my running boards a few times. And I’ve had an ongoing issue that the dealer hasn’t been able to fix - a water leak (I believe stemming from the moonroof), water gets into my v... Read more

Incident date: Nov 21, 2025

There have been several issues for which I had to take my vehicle to the dealer. I did the engine oil recall. Then 4 months later my engine was destroyed. I’ve had several issues with oil leaks. I had an issue with my running boards a few times. And I’ve had an ongoing issue that the dealer hasn’t been able to fix - a water leak (I believe stemming from the moonroof), water gets into my v... Read more

Incident date: Nov 21, 2025

There have been several issues for which I had to take my vehicle to the dealer. I did the engine oil recall. Then 4 months later my engine was destroyed. I’ve had several issues with oil leaks. I had an issue with my running boards a few times. And I’ve had an ongoing issue that the dealer hasn’t been able to fix - a water leak (I believe stemming from the moonroof), water gets into my v... Read more

Incident date: Nov 10, 2025

2026 GMC Sierra Elevation X31 with 3.0 Duramax Diesel engine, 132-miles, thrust bearing 1.53-mm out of tolerance requiring engine and turbo replacement. Engine build date 25219 (07 AUG 2025), vehicle assembly date August 2025, purchased 10 OCT 2025, entered service for engine and turbo failure on 11 NOV 2025, returned 10 JAN 2026.

Incident date: Nov 10, 2025

2026 GMC Sierra Elevation X31 with 3.0 Duramax Diesel engine, 132-miles, thrust bearing 1.53-mm out of tolerance requiring engine and turbo replacement. Engine build date 25219 (07 AUG 2025), vehicle assembly date August 2025, purchased 10 OCT 2025, entered service for engine and turbo failure on 11 NOV 2025, returned 10 JAN 2026.

Incident date: Nov 10, 2025

2026 GMC Sierra Elevation X31 with 3.0 Duramax Diesel engine, 132-miles, thrust bearing 1.53-mm out of tolerance requiring engine and turbo replacement. Engine build date 25219 (07 AUG 2025), vehicle assembly date August 2025, purchased 10 OCT 2025, entered service for engine and turbo failure on 11 NOV 2025, returned 10 JAN 2026.

Incident date: Jan 19, 2026

Vehicle had already "passed" the GM testing and received 0W-40 synthetic engine oil. Engine failure. Vehicle is currently at the dealership. This event put my family at risk of serious injury and possible death as the vehicle suddenly stopped working while drive on a bust street. Engine failure has been confirmed by the dealership, who have recommended installation of a new engine. There were no w... Read more

Incident date: Jan 19, 2026

We received a notification that our 2023 GMG Yukon Denali Ultimate engine needed to be tested as a part of a recall. We took the vehicle to our local GMC dealership. The engine was tested and determined to "pass". The "pass", we were told, meant that we did not need a new engine, just thicker oil, and that the engine was safe. Mind you, our car was a custom order, took 8 months to receive, and is ... Read more

Incident date: Jan 20, 2026

Lifter failure in 5.3 liter V8 causing extended repair

Incident date: Jan 16, 2026

My vehicle failed the Picotest that GM is conducting on the engine. It is currently sitting at Romain GMC in Evansville Indiana. I am not sure if I was at risk but the dealership says it's unsafe to drive so my assumption is that my safety was at risk. The dealership states that it will take 3 months before a new engine is installed. There were no symptoms leading up to this recall inspection.

Incident date: Jan 21, 2024

The contact owns a 2016 GMC Canyon. The contact stated that while driving at various speeds, the power steering feature suddenly malfunctioned, causing the steering wheel to become difficult to turn in either direction. After the failure occurred, the traction control warning light illuminated. The vehicle was taken to the local mechanic, who diagnosed that the steering column was faulty and neede... Read more

Incident date: Jan 13, 2026

My vehicle has experienced total engine failure. The first time occurred in 2024. The dealership replaced the engine with a new one. It has now failed for the second time. This time I nearly crashed as the vehicle went from 65mph to 0mph in 5 seconds. There was no warning and my vehicle is serviced regularly by the dealer I bought it from. The dealer has not yet responded with how they will resolv... Read more

Incident date: Dec 24, 2025

2024 gmc engine 6.2 that failed had the recall test done and a couple of mounts later engine started making loud knocking sound its at the shop now getting a new engine in been at the shop for about 3 weeks now

Incident date: Dec 24, 2025

2024 gmc engine 6.2 that failed had the recall test done and a couple of mounts later engine started making loud knocking sound its at the shop now getting a new engine in been at the shop for about 3 weeks now

Incident date: Jan 16, 2026

The radio dead out randomly. Which means the back up camera is non working. I wasn’t able to see a stump and hit it. Doesn’t seem safe. Like what would has happened if it was a person instead and they like the stump was in my blind spot while backing up. I feel like this is a safety issue. I have looked it up online and found out this is a common issue with these vehicles.

Crash

Incident date: Oct 22, 2025

I OWN A 2018 GMC SIERRA DENALI ULTIMATE, The truck has the 6.2 engine which had the lifter issue as stated with the current situation. At the time, the truck had 37,000 miles when the issues started. I purchased the truck from Andy Mohr with 8806 miles on it in November of 2019. I worked overseas for the DOD so that’s why the miles are low. After I got it fixed, ($4500 dollars at Hare Chevrolet... Read more

Incident date: Oct 22, 2025

I OWN A 2018 GMC SIERRA DENALI ULTIMATE, The truck has the 6.2 engine which had the lifter issue as stated with the current situation. At the time, the truck had 37,000 miles when the issues started. I purchased the truck from Andy Mohr with 8806 miles on it in November of 2019. I worked overseas for the DOD so that’s why the miles are low. After I got it fixed, ($4500 dollars at Hare Chevrolet... Read more

Incident date: Jan 20, 2026

Gear shifter will not go into park.

Incident date: Oct 3, 2025

When driving at about 30 mph the truck randomly shut off and would not start or try to start. I was later told the engine crankshaft rod bearings seized.

Incident date: May 8, 2025

While accelerating on the highway the truck started to vibrate along with a loud tick, CEL came on for misfire and traction control, hard shifting to where I could park at a safe area to wait for a tow. Kids in the car with me 90 plus degree day on the side of the highway.

Incident date: Feb 26, 2025

Truck started to vibrate and loud tick sound, CEL for misfire and traction control. Hard shifting until I could pull to a safe area to call for a tow. Around 76k miles on the truck when it happened.

Incident date: Jan 20, 2026

The engine has a knocking sound. I took it into the dealer and they replaced the exhaust system thinking that was the problem. However, the knocking still happens intermittently. I have video documentation of the noise.

Incident date: Jan 13, 2026

1-At approximately 40,000 miles, my transmission was replaced under warranty. It had been failing since approximately 2000 miles having a very hard time shifting between first and second gear. It was finally replaced at 40,000 miles. 2- At approximately 45,000 miles I took my truck into the dealership for this latest recall on the 6.2 L failure for inspection. Vehicle is inspected and I was told I... Read more

Incident date: Jan 15, 2026

For the second time since I have owned the vehicle that was purchased brand new. The engine seized during driving on the highway and began making loud noises that was knocking and jerking the vehicle. The issue occurred initially around 15,000 miles and was diagnosed as lifter failure, was repaired and returned in July 2022. At 64,000 miles on January 15, 2026, while on an interstate the engine di... Read more

Incident date: Jan 14, 2026

I have a 2023 GMC Delnali 1500 and the engine blew up 1-14-26 after the local CMC dealer 2 months ago done a check up recall from GMC that said they would do a test on the engine and cahnge the oil with a heavier weight oil that would solve the problem. After the dealer done the test and changed the oil to a heavier weight I was told all was good. Well 2 months later the engine blew up while I was... Read more

Incident date: Jan 15, 2026

Original inspection and recall was performed on my 6.2 engine on 12/02/25 and the engine failed on 1/15/26 , the vehicle is in the shop awaiting new Engine

Incident date: Jan 9, 2026

Warning about reduced acceleration and need for immediate servicing. Dealership reports notice about this issue by using diagnostic codes. Needs engine and turbo charger replaced. Vehicle has only 6500 miles on it.

Incident date: Nov 30, 2025

Vehicle was brought in for Campaign #25V274000 (6.2liter engine failure) and passed the manufacturer's testing. The oil was changed to a heavier weight with a new filter installed. Appx 770 miles later, the engine suffered a total failure. The engine was replaced under manufacturers warranty.

Incident date: Jan 18, 2026

I had the truck inspected for recall N25249400 on August 11, 2025 with 24,610 miles. It passed the recall inspection and the dealer changed the oil to GM recall recommended oil. On January 18, 2026 with 28,275 miles, the engine seized while on a major highway. The truck lost all power and just turned off amd would not start or turn over. The vehicle was towed by the Police due to the vehicle be... Read more

Incident date: Jan 18, 2026

I had the truck inspected for recall N25249400 on August 11, 2025 with 24,610 miles. It passed the recall inspection and the dealer changed the oil to GM recall recommended oil. On January 18, 2026 with 28,275 miles, the engine seized while on a major highway. The truck lost all power and just turned off amd would not start or turn over. The vehicle was towed by the Police due to the vehicle be... Read more

Incident date: Jan 15, 2025

Engine has developed a serious lifter / cam issue. dealer identified it as a result of Displacement on Demand design. Total engine replacement recommended by dealer but since the mileage on that vehicle is over 100,000 warranty, the repair is not covered. Known issue, should have been pointed out by dealer / manufacturer before warranty expiration. FYI _ I do all repair work at dealer. Vehicle ... Read more

Incident date: Jun 11, 2025

Catastrophic engine failure of known defective L87 engine

Incident date: Jul 16, 2025

Vehicle is having loss of oil issues.

Incident date: Jan 18, 2026

Driving along on an empty road and my panoramic sunroof back glass exploded it sounded like a gunshot going off. Could have caused a wreck it was so loud and scary.

Incident date: Mar 1, 2025

While driving in traffic in March 2025, the vehicle experienced a sudden and complete engine failure, creating an unsafe condition. Subsequent diagnosis confirmed failure of the camshaft and lifters, requiring full engine replacement. General Motors declined to cover this repair. However, this failure is consistent with widely reported camshaft and lifter issues affecting other GMC and GM vehicle... Read more

Incident date: Dec 28, 2025

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, there was an abnormally loud clamoring sound coming from the engine. There was no warning light illuminated. The vehicle was taken to a dealer, and the mechanic informed the contact that the engine might fail soon. The contact was able to continue driving the vehicle, but the contact was advised to br... Read more

Incident date: Oct 13, 2025

The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the engine seized. No warning lights were illuminated. The contact disabled the stop-to-start feature, and the failure ceased. The vehicle was taken to the dealer, and the contact was informed that the repair was not covered under recall. In addition, the contact was informed that the vehicle ne... Read more

Incident date: Jan 20, 2026

When driving at slow speed and wheels turning right or left you can hear a humming coming from the suspension. Unable to identify the issue. When wheels get straight the humming goes away

Incident date: Jan 20, 2026

When driving at slow speed and wheels turning right or left you can hear a humming coming from the suspension. Unable to identify the issue. When wheels get straight the humming goes away

Incident date: Jan 20, 2026

When driving at slow speed and wheels turning right or left you can hear a humming coming from the suspension. Unable to identify the issue. When wheels get straight the humming goes away

Incident date: Jan 20, 2026

The contact owns a 2018 GMC Acadia. The contact stated that while starting the vehicle and attempting to shift into park, the vehicle failed to recognize that the transmission was in park(P). There was no warning light illuminated. The contact stated that several attempts were required to shift the vehicle into park(P) to turn off the vehicle. The contact further stated that on other occasions, th... Read more

Incident date: Dec 17, 2025

On 8/22/25 was brought to my local GMC dealer for the L87 engine propulsion recall. The dealership tested and said the vehicle passed the test. On 12/3/25 while driving on a multi lane highway the vehicle engine stopped abruptly. The message restart engine appeared on the dashboard. I had to negotiate other vehicle travelling at highway speeds to get to coast off to a side street. The transmission... Read more

Incident date: Dec 17, 2025

On 8/22/25 was brought to my local GMC dealer for the L87 engine propulsion recall. The dealership tested and said the vehicle passed the test. On 12/3/25 while driving on a multi lane highway the vehicle engine stopped abruptly. The message restart engine appeared on the dashboard. I had to negotiate other vehicle travelling at highway speeds to get to coast off to a side street. The transmission... Read more

Incident date: Dec 17, 2025

On 8/22/25 was brought to my local GMC dealer for the L87 engine propulsion recall. The dealership tested and said the vehicle passed the test. On 12/3/25 while driving on a multi lane highway the vehicle engine stopped abruptly. The message restart engine appeared on the dashboard. I had to negotiate other vehicle travelling at highway speeds to get to coast off to a side street. The transmission... Read more