This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.
So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.
Since brand new, the engine makes a significantly loud chirping sound at two occasions. First is every time the fuel saving auto start kicks in to start acceleration. The other is any time you come to a stop from above 25-35 MPH. At around 16 MPH, there is a loud chirping as you decelerate. This appears to be a timing malfunction and is affecting fuel economy. The vehicle has 8,800 miles on it, and it is getting worse. It has been looked at 4 times and has not been identified. I know there was a GM bulletin from 2022 about this 6.2L V8 Engine, but they state it is "normal". I have never heard a normal sound of this kind from an engine. And certainly not on a $75K vehicle. Please investigate and make them correct the issue or replace the engines. people work too hard to afford nice vehicles, and should not have to deal with this issue.
Engine started making noises. I had it towed to dealership to get it diagnosed. Dealership called me next morning to get information on what vehicle was doing. I called dealership that same evening and they informed me that the engine locked up on the tech diagnosing the issue, and I was going to need a new engine.
I was waiting in a parking lot to pick up the kids from school. In park, the truck loses power and almost completely shuts down. When it Reva back up there was a horrible hammering noise. I turn the truck off. Then I called the dealership and told them. I cranked it and recorded it for them and then shut it off. Then the tow truck couldn-??t tow and it took two hours to get it loaded because of the features locking things down. It has been 29 days before the finally told me it needs a whole new engine. They still will not tell me why though.
My truck was put on an engine oil consumption plan at ~14,000 milee. Then a month later the engine complete seized while i was driving at 60 mph in the middle of southeast Missouri. The dashboard started flashing with a warning saying that I needed to press the start button. The vehicle came to a stop and i was unable to get it to turn over. I currently have a warranty claim with GM amd the vehicleis at Laura GMC in Collinsvill, IL awaiting a replacement engine. I have no confidence in GMs ability to fully resolve the issue. My life has been completely disrupted as a result of their lack of quality controls.
- Chesterfield, MO, USA
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Engine bearing failure, complete loss of power while driving and turning left into oncoming traffic. Bearing failure confirmed by GM Dealer, brass shavings in oil pan.
My 2019 GMC Sierra AT4 - Driving home from work on the highway car lost sudden power, All engine notifications appeared on dash and a very loud screeching sound happened. Was able to pull it onto the side of the road barely. Diagnosis from nearby shop was a lifter failure in cylinder 5 causing metal shavings to lock crank up. Total engine replacement. Car has 122,000 miles and every oil change done at 3,000 miles by GMC service technician since new and documented. GMC offered nothing when notified about the issue.
Truck thinks I-??m about to run into something and slams on its brakes. Last time it sent my sister to the hospital to get 6 staples in her head. Digital cluster goes on and off as well as the infotainment center. Transmission bangs and shifts horribly. 900 miles on the truck with a check engine light and transmission warning.
The contact owns a 2024 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the vehicle lost motive power with the message "Engine Power Reduced" and the vehicle was unable to accelerate above 5 MPH. The vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine warning light was illuminated. The vehicle was towed to the dealer, who was unable to duplicate the failure or provide a diagnosis. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was approximately 9,000.
Exactly what was described in the N192220080 Recall on New Model 2019 Chevy Silverados in cold climates (Like Utah winters) so at 45,280 miles the oil line popped out just like the recall described There were no oil leaks or signs of oil loss in the driveway where the truck is parked. My [XXX] wife (The owner of this vehicle) was only 6 miles from our house on the way to a doctors appt when the -??Oil Pressure Low Turn Vehicle Off-?? light came on. Luckily she wasn't on the freeway so was able to pull into a neighborhood where all of the oil shot out of the engine due to the oil cooler line detaching. Since the N192220080 excluded other trucks made in the same factory as the once recalled in Alaska & Canada, we received no warning of a potential issue like this existing for this model of Silverado. It is also concerning that a known faulty part in all New Model 2019 Silverado 1500s was only recalled in Alaska & Canada. But if we had purchased this truck and registered the vehicle in Alaska, it would have at that point qualified for the free recall replacement instead of the $1,600 bill we were blindsided with (Plus, if she was on the freeway and couldn't immediately pull over, we would have had a seized engine so the truck would have been nearly totaled) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
To Whom It May Concern, This is a brand new 2024 GMC Sierra AT4 Diesel Truck with 4,000 miles. The first incident occurred when I was doing about 5 mph. The truck maintained its speed without my foot on the gas pedal and the cruise control was not on. Then when I tapped the gas pedal, everything return to normal. The second incident was about 2 weeks later in which the same thing happened. The third incident which was about one week later, I was doing about 5 mph and the truck accelerated on its own. I let the truck accelerate to approximately 28 mph. At that point I hit the brakes to stop the vechicle and pulled over. The truck was idling very high so I turned off the engine. All the ignition lighting remained on, but the truck would not restart. Even after removing the keys from the vehicle the ignition lighting remained on. At that point the truck had be towed back to the dealership which is Rainbow Buick, GMC in Covington, Louisiana. I've been told by the Rainbow Service Department that they do not know what's wrong with the truck. It's been sitting there for 10 days now was a dead battery. My salesman who I don't really believe, said he has the exact same truck and it happen to his tuck at 30,000 miles. I file a claim with GMC Customer Support but have yet to hear from them. I'm obviously very disappointed with my new truck, my salesperson, and service department. If there's anything you can do to help please let me know! Thank You, [XXX] Cell: [XXX] Email: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I was stopped at a light while I was in drive. While I was waiting for the light to change the truck shut off suddenly with no warning. The dash message said to restart truck. I had to put it back in park then hit the push button to restart truck. It started right away. The truck had enough fuel and no reason to shut off on its own. The truck has less than 1,200 miles when this occurred. The truck had a shudder when it downshifted prior to this happening and then shut off about a minute later. Some shuddering seems to be the way the truck downshifts. This is dangerous if you have to just slow down and takeoff again and then it shuts off on it-??s own. This can cause a crash.
I was driving my vehicle, with my 9-year-old son in the back, when it seemed to completely lose power and shut down (while I was driving!). The power steering, brakes, and gas all gave out. I was able to steer myself toward the side of the road where I waited for a tow. The vehicle would not start, nor would it shift into neutral, which led to towing challenges. This is a 2024 vehicle that I've had for about eight months, and it completely gave out while I was driving with a child in the back, which is a significant safety concern. Nobody at the dealership or GMC is able to offer anything with respect to information on how or why this happened and what you are doing to resolve the issue. From what I see online, this is a known issue that GMC is likely to be sued for in the future.
A D V E R T I S E M E N T S
- Old Bridge, NJ, USA