2021 CHEVROLET SUBURBAN Complaints

While driving, a message appeared on the dash that stated 'reduced acceleration'. My car was not able to accelerate over 40mph. The engine was much louder than normal and sounded like a loud fan was running. The check engine light came on as well.

We were driving our Suburban and out of no where the check engine light starts flashing. Mind you we had no problems leading up to this very moment. We took it to a mechanic the very next day and were told we needed a new engine.

Loud ticking noise coming from the engine bay and extreme shaking. All happened after dropping off clients and getting on the highway on September 5, 2023. Took vehicle to two different mechanics and they said the camshaft and lifters had to be replaced. They recommended it would be cheaper and better if I replace the whole engine, which I did and had to pay out of pocket.

I was driving our 2021 Chevy Suburban, which had ~107,000 miles on it, at approximately 75 miles per hour. With no other indication, the low oil pressure light came on, then within two seconds I lost all power (motor shut off) and lost electronics in the car. I had to man-handle the vehicle to get it off the road without power or dash controls. Our family was stranded near the California/Nevada border with no cell reception in the middle of the night for over seven hours. I spent a fortune having the vehicle towed to a Chevy dealership (Wild West Chevrolet in Yerington, NV) where they indicated that there was a main bearing failure which caused the engine to seize. A full L87 motor replacement is required. The motor is currently on backorder with GM due to the high number of L87 engine failures. GM has not provided an estimated date of when they plan to have the motor replaced.

Driving at 65MPH on a three-lane highway with heavy traffic, there was a sudden loss of motive power without any prior warning. As the motive loss occurred, the check engine repair light illuminated. I immediately illuminated my hazard lights. Luckily I had enough momentum to safely glide the vehicle over three lanes to the breakdown lane. I was fortunate that other vehicles gave way to me or that I was not on an incline, otherwise the vehicle would have been stopped in the middle of the highway. After repeated attempts, the vehicle would not restart and had to be towed to a dealership. The dealership confirmed the problem and repair was covered under warranty.

Hi, my name is [XXX] . I have two major issues with my 2021 Chevrolet Suburban: The value body failed for the 2021 Suburban in December, causing engine power reduction and the engine transmission was not shifting properly. This was covered by my extended warranty, which I paid $2500 extra for at the time of purchase. Also, this VIN is for a Chevy Suburban Duramax Diesel. The Emissions Control Module ( ECM ) light has come on several times, starting from about 20K miles to now 61K miles. I noticed the ECM light comes on at about a 8K mile interval. I take it into the dealership and they have told me this is due to a software issue and then they reset the light. This has happened on at least 4 occasions since about 20K miles. However, now at 61K miles, they are telling me that the exhaust system has a leak and it may not be a covered repair under even my extended warranty. Basically, General Motors has kicked the can down the road on the ECM issue until it is no longer under warranty, and now they want me to pay for this expensive repair. This is wrong, I hope you can protect me and other Duramax owners from GM's unscrupulous business practices. You can reach me at [XXX] for more details. Thank you, I am considering legal action against GM for this issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

brake master cylinder failure, took car to chevy after brakes got super hard to push , luckily no accident , felt like no brakes, at the point of failure, brake light, abs light, check engine light all went on ,at some point abs and brake light went off but check engine light stayed on and screen on Dash indicated max speed 62 then in a couple of minute screen showed max speed 42 mph , then lights go off except check engine and vehicle works as it should it randomly does this in one day so vehicle was taken in to dealership where they had a hard time figuring out if thats the problem and contacted gm tech support gm and they said with these codes it should be the brake master cylinder, and it would cost me 3000.00 to fix. on an 80 000.00 car that's a 2021 with 82,000 miles and they are pretty certain that will fix the problem, I'm pretty sure I don't want to get in an accident at 65 to 70 mph and die I feel this is a huge safety issue and thank god wife and kids weren't in the car considering this is my wife's car to drive the kids around in

Rear drive shaft friction Message on the display read: Service Transmission Now Unable to Shift Soon

The fuel tank strap bolts became loose and fell out, causing the fuel tank to drop. The vehicle has the original fuel tank and to our understanding, it has never been removed. We purchased the vehicle new and are the only owners.

Has been in the dealer multiple times for very hard shifting issues. Jerks when shifting gears from stop or in lower speeds. They have tried everything and cannot figure it out. But the techs have felt it when driving as well. It has been doing it for a long time. And it’s a concern when driving, I do not feel safe.