2020 Buick Enclave

The contact owns a 2020 Buick Enclave. While the contact's wife was attempting to park the vehicle, the transmission failed to shift into park as needed. The contact stated that after several attempts, the vehicle was parked. The contact used bricks to chock the wheels to prevent the vehicle from rolling backwards. The vehicle was towed to the dealer. The vehicle was diagnosed with a failed valve body and internal transmission failure. The contact was informed that the transmission needed to be replaced. The manufacturer was contacted by phone and a case was filed. The failure mileage was approximately 58,000.

NHTSA ID

11766427

Incident

Sep 20, 2026

Mileage

58,000 mi

My car started making a loud and rattling noise and when I had my vehicle looked at there was a huge crack in my exhaust pipe which could potentially be leaking harmful toxins in the cabin of my vehicle. I have been to so many places who say they don’t have what they need to repair this and that I need to reach out to GM. I have seen over 30 similar stories in these complaints. This is very unsafe and something needs to be done about this for the 2020 model as it has been done for others. We are afraid to even keep all the windows rolled up with our children inside for fear of carbon monoxide leaking through.

NHTSA ID

11766314

Incident

Aug 26, 2026

Vehicle suffered a catastrophic, uncommanded electronic and mechanical system failure within 30 days of purchase, resulting in a severe crash.Prior to the incident, the vehicle exhibited a violent, unexpected jerking motion while accelerating up a highway on-ramp, though control was briefly regained. A few days later at the end of May, while driving in the rain, the electronic systems completely failed with zero dashboard warning lights or error messages appearing.The vehicle completely overrode driver input, veering uncontrollably from lane to lane on its own. Simultaneously, a total loss of braking power occurred; pressing the brake pedal had no effect on reducing the vehicle's speed. To stop the runaway vehicle and prevent hitting other drivers, I was forced to intentionally steer the SUV into a physical wall. The impact deployed components, caused orange engine coolant to leak, and forced the electronic precision shifter into Neutral on its own before the vehicle lost all electrical power. The steering wheel airbag deployed during this initial impact.Approximately 5 minutes later, while the vehicle was disabled on the road and after I had safely exited, a secondary vehicle struck my stationary car, which caused the majority of the remaining airbags to deploy.Detroit Police responded to the scene and filed an official crash report noting that I 'lost control' and struck the wall, but the responding officer failed to document the mechanical/electronic brake and steering failure reported at the scene.This simultaneous loss of eBoost braking control and electronic steering assist strongly aligns with the current federal safety investigation into GM vehicles (NHTSA Case PE24011). The vehicle is currently parked and being preserved exactly as-is at my residence to serve as evidence, as the module memory holds the Event Data Recorder (EDR) data proving full brake application during the failure. I am requesting an immediate investigation into this VIN.

NHTSA ID

11764882

Incident

May 23, 2026

My car starting making a loud noise upon start up and continued while driving, sounded like a GoCart exhaust system and was not normal. It just sounded loud and would get louder when accelerated until the car ran for awhile. I first noticed it at about 83,500 miles. I took to the dealer for checkup at 83,950 miles when I could get an appointment. The dealer (Elco Chevrolet) confirmed the problem upon hearing and looking under the car, there is a bracket broken on the exhaust system and the catalytic converter has a hole/crack in the molding. Our safety is at risk if the exhaust with the crack would create fumes harmful when driving the car and risk of injury if the exhaust would fall off upon driving due to bracket broke. There were no warning lamps or messages from the car. I am submitting this problem as upon discussion with the dealer and investigation online about this, appears that this is a problem with GM vehicles with this make and model, Enclave and Travers, however, my year was not flagged for a recall already established. When I tried to investigate with GM they stated it was because my car was not identified likely due to parts or timing. I am asking to further investigate as there may be a problem with the design of this exhaust system that caused this issue early in the mileage of this car. Asking for further investigation into the make and model of this year for the year 2020.

NHTSA ID

11755725

Incident

Jun 8, 2026

The mounting bracket welded to the front exhaust pipe (near the flex section) broke off due to weak factory welds. As a result tearing a hole in my exhaust pipe and potentially leading to exhaust fumes leaking into the cabin of the vehicle. In my opinion this defect should be addressed as a safety issue if not repaired.

NHTSA ID

11754749

Incident

Aug 3, 2026

Drivers side seatbelt would not latch and dealership said it needed replaced.

NHTSA ID

11750337

Incident

Jan 24, 2026

Front exhaust pipe separated from its mounting bracket causing a consistent rattle. This condition is exactly as described in "N222385510 - Special Coverage Front Exhaust Pipe", released in May 2023. Exhaust components in this vehicle are materially the same as the covered 2021 vehicles and thus this vehicle should be similarly covered. Issue has been confirmed by a dealer and is available for further inspection.

NHTSA ID

11749965

Incident

Jul 13, 2026

I am submitting this complaint regarding a paint defect on my 2020 Buick Enclave. The passenger-side rear door has significant top-coat peeling and flaking, exposing the primer and metal underneath. This deterioration is not normal wear for a six-year-old vehicle that has been properly maintained and protected from environmental conditions. The pattern of peeling indicates a failure of the top coat or clear coat applied during manufacturing. The paint layers are separating prematurely, reducing corrosion protection and long-term durability. Exposed metal increases the risk of rust, structural weakening, and potential failure of the door panel, which may affect occupant safety in the event of a collision. I am aware that similar paint adhesion failures have been reported across multiple General Motors vehicles, and class-action lawsuits are currently pending alleging defective basecoat and clearcoat systems that cause premature peeling, bubbling, and flaking. The number of complaints suggests a broader manufacturing issue rather than isolated consumer misuse. Although my vehicle’s limited warranty has expired, the defect is clearly premature and manufacturing-related. A properly applied top coat should not fail this early, especially on a vehicle that has been routinely washed, waxed, and stored in normal conditions. I respectfully request that NHTSA review this issue and consider opening an investigation into paint top-coat failures on Buick and other GM vehicles. Premature paint failure affects corrosion resistance, vehicle longevity, and consumer value, and may compromise the safety of occupants and other drivers if corrosion spreads or structural integrity is reduced. I am willing to provide photographs, documentation, and maintenance records to support this complaint. Thank you for your attention to this matter and for your commitment to consumer safety and manufacturing accountability.

NHTSA ID

11748311

Incident

Jul 1, 2024

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

PI to help diagnose A/C concern

This preliminary information communicates information about how to determine if a wheel and tires size change is available.

This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss