2021 CHEVROLET SUBURBAN Complaints

The headlight adjustment screw is broken. Was never used or adjusted and now the headlights point to the ground. GM does not offer a replacement part for the adjustment screw, the only fix is to purchase a whole new headlight assembly which is roughly $1,000 before installation costs. This causes a dangerous situation since the drivers side headlight points to the ground and it is hard to see in front of you at night.

While driving along on a city street, the check engine light came on. Once I turned onto the highway, there was a pop from the engine, and the vehicle started missing and vibrating. I turned around and drove the vehicle back home. A mechanic looked at it and said there were a lot of problems and recalls on these vehicles for misfiring. He said the problem is the lifters and they need to be replaced as soon as possible. He encouraged me not to drive it due to it may cause more damage.

Engine light comes on and now flashes. The service traction control and esc comes on. The whole vehicle shakes when idling. Certified GM dealer hooked it up and it says misfiring cylinder 6. All spark plugs replaced, new GM coil, new spark plug wires. Nothing has fixed it yet.

I was driving when I received messages saying service ESC, Forward collision System Unavailable, & Service Traction Control. The vehicle began to shake hard when I applied brakes, had loss of power when pressing the gas pedal, and sounded like metal grinding. All of this put my children & I at risk as we were on interstate 35 with cars flying past us and I’m losing power. Initially the spark plugs and coil was were changed to no repair. It was towed to a dealership where they confirmed the lifter & cam failed which put metal in the oil. My only option is a full engine replacement costing 20k on a vehicle that’s 4yrs old. It’s not ok that I have to spend that in order to get my 70k car drivable. Im now without a car, still paying a car note, unable to get my kids places, and having to get help from friends all bc GM can’t build a quality vehicle. I also haven’t been able to get a loaner car. This isn’t happening in only the 6.3L. This is a widely known issue with the 5.3L as well. *There were ZERO warning signs that something was wrong. Drive just fine that morning*

Driving vehicle on a highway at 55mph, tried to speed up, no propulsion. Fuel injector went bad.

I was standing at a red light with my foot on the brake and the car went into neutral and stalled. I could not restart the vehicle and had to be towed to the dealership where there confirmed a fuel pump module failure. There were no precipitating factors or warnings. This is extremely dangerous. The car is only 4 years old and many people have reported the same incident online, which often recurs, even after replacing the fuel pump. The dealership has ordered the part however it is on backorder without any estimated ship time. For a vehicle I paid over $70K for, this is concerning and frustrating. There is a known recall for 2021 Suburbans for this exact issue.

My suburban is 4 years old and needs a new engine. The dealership is seeing a lot of 21's with the same issue. Bank 1 and 2 have failed, both powerods are broken and the cans and lifters have failed. There were no prior warning. We were driving and 2 warnings popped up and we took it to a dealership. We then went to a private repair shop for second opinion. The warranty is 70k miles and my car is 72k miles. This should not be happening with a 4 year old. The other Suburban engine has been recalled but mine has no current recalls on it.

The contact owns a 2021 Chevrolet Suburban. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated that while driving at various speeds, an abnormal sound was coming from underneath the hood. The check engine warning light was illuminated. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 130,000.

Was driving about 45 mph on 2 lane road. All of a sudden, without warning we lost power (had no propulsion). Luckily there was a residential side street that we were able to turn onto and get off of the highway with no shoulder. We coasted to the side of the street and called a tow truck. Had we not been able to get off the road, we would have been dead in the road, blocking an entire lane of a busy 2 lane highway without a shoulder to pull off on. There was no warning prior to incident but a message did appear during the incident. I believe it said "Loss of propulsion." We turned off the vehicle, then tried to restart it. Engine attempted to restart, but it made a horrible noise & wouldn't restart. Still had battery power. Vehicle was towed to a local dealership where it is currently being evaluated. We know of a massive recall on the 6.2 l engines. Ours is a 5.3 l engine. So far I'm seeing many people having problems but no official recall for the 5.3 l engines that are having THE SAME issue as the massively recalled 6.2 engines. This needs to be looked at. Our Vehicle only had less than 30k miles on it. We bought it new and have done routine maintenance.

After a major HVAC repair involving the evaporator core (performed at a Chevrolet dealership), my vehicle began experiencing serious electrical issues. The second-row 12V outlet no longer functions, and the vehicle has gone completely dead three times while the engine was off due to the auto stop/start system — once while stationary on a major highway, creating a dangerous situation. Each time, the engine failed to restart automatically, and the entire electrical system became unresponsive.