2021 Chevrolet Suburban problems

“On August 25, 2026, I was driving a chevrolet 2021 with less than 60K miles on it on a double lane road when I came to a red light, the car did not move when the light turned green, I put the car on park then drive again and it completely shut down. Prior to this there was no lights showing any issues with the car. It did not drive again, and I had to have it towed home then to a body shop where I spent 2K and drove the car out but was told to take it to the dealer immediately. At the dealer they said it needed a complete engine or motor replacement that cost 12k but they would cover about 8k and I would be responsible for about 4k. I was called to pick it up and it was still making a weird noise they said it was something else, it is November 3, 2026, the dealer still has my car,and they won't even answer the phone, no loaner available, and I am terrified after hearing so many stories about 6.2L engines that I will be driving a car that can put me at risk even after replacement. please help me.”

“Shuddering and vibration between 25-40mph during low acceleration. Seems to be getting worse. Have an appointment with a dealership to do a diagnostic and can upload that information later. Service advisor suggested that it is an extremely common problem in my vehicle and very expensive to fix.”

“Pulled out in 4 lane traffic. Got almost to 55mph. Vehicle lost all power, slowed down and auto shifted to neutral, vehicle stopped and went to park. Vehicle would not start back nor transition to Neutral to remove from highways. 2021 suburban with just 35,000miles. Shut down a lane on a 55mph highway. Code P129F”

“The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving 20 MPH, the radio display screen was blank. Additionally, the vehicle turned on and off independently, the doors locked and unlocked independently, and the liftgate closed independently. The contact stated that the power running board failed to operate as needed and failed to activate on the front driver’s and passenger’s sides of the vehicle. The failure had occurred on several occasions. A dealer was contacted. The vehicle was towed to the dealer, where it was diagnosed and determined that the battery needed to be replaced. The approximate failure mileage was 68,448.”

“The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving at 55 MPH, the vehicle shuddered and shut off completely without warning. An attempt was made to restart the vehicle, but the engine failed to restart. The vehicle was towed to a dealer, where a diagnostic inspection revealed a lifter failure, and the engine was replaced. The contact stated that three months after the engine replacement, the engine was leaking oil and the transmission failed. The failure mileage was 160,000.”

“Lane departure assist, adaptive cruise control, auto emergency braking, adaptive high beam, forward collision warning system became unresponsive while driving on highway during trip. Had to take vehicle into GM dealership for ADAS camera replacement.”