2021 CHEVROLET SUBURBAN Complaints

While driving at normal highway speed, the vehicle speed is suddenly reduced and it feels and sounds like the transmission has shifted into low gear. The following warning light activated: Reduced Acceleration Drive with Care. The GM dealership service center stated that the transmission control valve body needed to be replaced. They indicated that this was a known issue. I believe a safety recall should be issued for this defective part.

Sat may 3rd We went for tire change from that date since that day, every time we try to start the car there’s always a different warning light The warning light is never the same issue. On may 15 when we received a warning light about transmission we went to the dealership that day they said they were about two weeks backed up but flushed the transmission and paid $504 for the service. Since that day we also received numerous warning light which include. Driver window. Esc. Winshield fluid. Tire pressure. Lift gate open. Forward Collision System Unavailable. Your 2021 Chevrolet Suburban detects a battery, starter or connection issue. Lastly the check engine light came on and the car won’t start.

The contact owns a 2021 Chevrolet Suburban. The contact stated that while pulling out of a parking spot in a parking lot, the vehicle stalled. The contact attempted to restart the vehicle and observed a knocking sound coming from the engine compartment. The vehicle was not able to restart. The vehicle was towed to the dealer where it was diagnosed and determined that the engine had seized and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 23,906.

I am contacting you regarding a critical engine failure in my 2021 Chevrolet Suburban LT, which is equipped with the L84 5.3L V8 engine. Due to a valve lifter malfunction, the engine suffered catastrophic failure, with metal shavings found throughout the oil system and internal components. I’ve been quoted approximately $14,000 by the dealership/service center to replace the engine, and the vehicle is currently awaiting repair. I was driving the car with my son when the vehicle began to shake, make ticking noises, and the check engine light went on. I pulled off the road and several error codes popped up including "Service ESC" and "Service Traction Control." This is the second time that a lifter valve has failed on this vehicle. In 2022, the lifter valves on the left side were replaced under warranty. It appears one of the left side lifter valves failed again, this time causing significant cam shaft damage and damaging the engine. Given that this issue appears to be affecting many owners with similar engine configurations, I would appreciate your assistance in investigating this matter to see if these issues stem from possible manufacturing defects which could result in engine damage or failure. I reached out to General Motors to ask if I qualify for extended coverage or any known service programs to address this situation and they told me I should talk to the dealership because they are unwilling to offer assistance. I've attached receipts for repair of the lifter valve in 2022 and the current diagnosis of engine failure, cam shaft damage, and lifter valve failure. This vehicle is only four years old and was regularly serviced by General Motors. It is available for further inspection. Please let me know what other documentation or information you require. Thank you.

My 2021 Chevy Suburban Premier suffered a sudden internal engine failure due to collapsed lifters and a damaged camshaft. The vehicle began experiencing performance issues, including rough idling and loss of power. After taking it to a certified mechanic, it was confirmed that the lifters failed and caused significant damage to the camshaft, requiring a major repair that I had to pay for out of pocket. This issue is widely known among GM vehicles with the 5.3L and 6.2L V8 engines and has been the subject of numerous technical service bulletins and customer complaints. While my vehicle is not included in the current recall (NHTSA ID: 25V-274), which covers crankshaft and rod failures on L87 6.2L engines, this lifter failure is part of the same engine family and indicative of a broader defect in GM’s V8 engine platforms from 2021–2024. I’m requesting that NHTSA investigate these lifter and camshaft failures as a safety and reliability concern, and urge GM to expand the existing recall to include these known engine issues. Many customers, including myself, are incurring thousands of dollars in repair costs for problems that are clearly tied to manufacturer defects.

[XXX] Vehicle had multiple engine lights on I immediately called dealership Battery and injectors replaced. [XXX] check engine lights on again Vehicle had an intake lifter break and damage the camshaft and caused cylinder misfire. Vehicle was said to be repaired. [XXX] Vehicle had total loss of forward power while driving causing me to drift to safety (Hazard)before being restarted lost the ability to be placed in reverse and limp mode took over. Vehicle was towed to Jim Shorkey Chevrolet in Bakerstown Friday April 11th 2025. (Unsafe to drive) Vehicle is in their possession with no replacement vehicle. I am waiting on a part that is not available and unknown when it will be available. Part unavailable Ten speed valve body part #24065354. Contacted service manager no calls back. Contacted Chevrolet Customer Care number [XXX] . Customer care claims the dealership does not respond to their requests. Currently without a vehicle a whole month. Service Advisor continues to promise courtesy vehicle with no follow thru. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My vehicle went from completely fine to having a loud knocking noise while I was driving 65 mph down the 4 lane highway. My vehicle lost power and slowed down. I was 50 miles from a dealership. They had to replace my entire engine and crankshaft. It cost over $12,000.00. This exact issue has been recalled by GM, but websites say my vehicle is not covered. The dealership had my vehicle for a month doing repairs.

The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving 20 MPH and approaching a light, there was an abnormal ticking and knocking sound coming from the vehicle. There were no warning lights illuminated. The contact stated that the vehicle failed to accelerate above 25 MPH. The contact stated that the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The vehicle was taken to an independent mechanic who determined that the vehicle had experienced engine failure. The vehicle was taken to an unknown local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted, but no further assistance was provided. The failure mileage was 132,000.

While at stoplight, check engine light came on and car starting shaking and could feel it hard shifting between gears. Heard banging noise from engine when trying to drive. Took it to the dealership and problems with camshaft and rod.

Safety Defect Complaint Vehicle Equipment: - Anti-lock Brakes - Full Front Air Bag - Passive Disabling Anti-theft Device Introduction: I am the registered owner and primary driver of a 2021 Chevrolet Suburban. I am filing this safety complaint regarding a serious system malfunction that occurred during an accident in 2023, resulting in injury to myself and my daughter. As a responsible vehicle owner who has maintained this vehicle according to manufacturer specifications since its purchase on July 21, 2021, I am deeply concerned about the safety implications of this incident. Safety Defect Description: In 2023, my vehicle experienced a critical system malfunction during a collision incident. While the vehicle was not in a rollover situation, the system incorrectly detected one, resulting in: 1. Complete vehicle shutdown during active accident conditions 2. All airbags deployed simultaneously 3. False rollover detection despite vehicle only experiencing vertical displacement when something from another vehicle hit the front of my vehicle Injuries and Medical Response: - Driver (self) sustained mild concussion requiring emergency transport - Daughter required emergency medical evaluation - Both occupants transported via ambulance to hospital Insurance Claim Impact: - MetLife denied accident and hospital claims - Denial basis: Absence of traffic citation - Virginia State Police report indicated no-fault accident - This denial has created significant financial hardship due to medical expenses and vehicle repairs - The vehicle's system malfunction has contributed to difficulties in proving accident circumstances Ongoing Vehicle Issues Post-Incident: - Persistent power loss issues, Multiple alignments required, Compromised driving dynamics and handling, vehicle does not track correctly despite repairs Safety Concern: The vehicle's incorrect rollover detection and subsequent complete shutdown during an active accident scenario presents a serious safety risk.