2021 CHEVROLET SUBURBAN Complaints

With cruise control activated, at least 10 times since I bought this expensive vehicle the automated emergency braking activated at highway speeds - causing the vehicle to full brake without warning and nearly causing an accident each time (handling risk and risk of being impacted from behind by a following vehicle). I have formally reported this issue to dealers in MN and MT, and they only thing they said was they could not duplicate the condition during brief test rides and this was not a know problem. I personally know this was a known problem and GM did a safety recall for this condition on MY15-20 Suburbans. This condition is definitely an unreasonable risk to motor vehicle safety. In additional, the original tires supplied by GM (Firestone) failed under normal driving conditions after only about 35,000 miles, and both GM and Firestone denied there was any warranty coverage. Since then, new Les Schwab tires failed at about the same mileage. Something is obviously not right with this vehicle, and this condition is also an unreasonable risk to motor vehicle safety. Finally, last week my front passenger wheel cracked. I have not hit anything significantly hard with that wheel - but it is nonetheless cracked. This is also obviously defective and an unreasonable risk to motor vehicle safety.

In traffic, approx. 10-15 MPH car in front stopped short. I put foot on the brake pedal and pushed the brakes pedal to the floor. The car did apply the brakes equally as hard as I was Appling brakes at the pedal

We were traveling approximately 30 mph approaching an intersection of a 5 lane road. A vehicle in front t of us had pulled into the turn lane. As we approached the vehicle that was already completely in the other lane, our car suddenly braked to a complete stop even though my foot was only on the accelerator as it is a 40 mph speed zone.

I was driving on the freeway about 65 mph on Saturday June 18. In a sudden instant, there was a message on my dash "brake module failure" and "speed limited to 62 mph". Also warning message that "forward collision warning was off" , etc. The ABS light, the "check brakes light", and the check engine light all were on. Also, the power brakes went completely out and to stop I had to press really hard with manual brakes. I don't think a small framed person would have been able to stop and if I had been at a moment where I needed to stop quickly I don't think I would have been able to stop had there been a need to stop quickly. The dealer tells me that the brake master cylinder failed. The car has 43,000 miles and has been well maintained.

2nd time in less than a year it has had lifter failure. we travel almost every weekend and this puts my family in danger being broken down on a highway, especially at night. yes it has been confirmed and have been told that it is a wide spread problem no notice before it happened

While driving, I received a notice identifying a problem with the ESC system and that there was a brake system failure. I have received an advanced diagnostics alert about the antilock braking system. the vehicle was difficult to stop and required excessive pressure on the brake pedal.

The contact owns a 2021 Chevrolet Suburban. The contact stated while driving 80 MPH, the vehicle started shuddering and the engine was misfiring. The traction control, adaptive cruise control, and check engine warning lights illuminated. The vehicle then downshifted to 40 MPH independently. The contact turned the hazard lights on and continued to drive approximately 35-40 MPH. The vehicle was taken to the local dealer where it was diagnosed that two sets of engine lifters were bent and needed to be replaced. The manufacturer was notified of the failure and covered the replacement of one set of engine lifters under warranty while the other set was replaced at the owner’s expense. The vehicle was repaired. The failure mileage was approximately 12,800.

This vehicle has a problem with their lifters in the motor. It breaks down and you cause your engine to start shaking and makes a click sound like if its rubbing to something in the motor to cause a future problem in the motor and Engine light comes on. Many people have experienced this same problem with this make and model. My left lifter when out and they fixed it but what about my right lifter why didn't they replace the right lifter. This is a problem that Chev knows, and they have not recalled the lifters. Chev going after the company that made these lifters, so they know it's a problem why hasn't this been recalled? What if I was on a long road trip when this happens. This could blow out the motor and I could be stranded in the middle of now where if this happens.

Came to a stoplight and the car came to a stop. The car then automatically shifted into park on its own. The car would not shift out of park an the engine would not start. The car just died. Police showed up as I was in the middle of traffic and no one could even get the car to shift into neutral to push it out of the road. Very dangerous situation. Tow truck came and they could not even get the car in neutral. So they had to drag the car onto a flat bed. Dealer has examined the car. The starter was bad, the fuse box was bad but the major issue was in the engine where the lifters went out. To have the lifters go out at less than miles is unacceptable. The dealer commented that they are seeing this issue constantly from 2021 Chevy SUVs. This is a major safety issue in that there is no was to put my 2021 suburban in neutral when this happens to clear the vehicle from a busy highway. Please investigate this.

The contact owns a 2021 Chevrolet Suburban 1500. The contact stated that while driving at approximately 75 MPH, there was a loud explosion coming from the vehicle. The contact noticed that the sunroof had shattered. The contact mentioned that the sunroof was closed and covered and that glass fragments had not entered the cabin of the vehicle. The vehicle was taken to the dealer where the contact was informed that the fracture was caused by a rock striking the sunroof. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 24,000.