2021 Buick Envision

The contact owns a 2021 Buick Envision. The contact stated that while his wife was driving at an undisclosed speed on the freeway, the vehicle unintendedly accelerated around a corner, with the floor mat stuck under the pedal. The driver depressed the brake pedal for an extended time, but the vehicle continued accelerating. The driver pressed the park button, which slowed the vehicle, and the driver was able to pull over safely. There were no warning lights illuminated. The vehicle was taken to the local dealer, and the owner was informed about a possible recall. The dealer determined the failure was due to a stuck floor mat and sudden unintended acceleration. The front and rear brakes were replaced along with the floor mat. The floor mat was PN: 84734211. The manufacturer was not contacted. The failure mileage was approximately 37,000. The VIN was not available.

When I start at a low speed it's like it does not know which gear to go in. You push on the gas and it does not move much and then launches forward. It has done this since I purchased it in April 2025 used.When in auto stop and the engine starts up with my foot still on the brake, sometimes it will lurch and buck. Buick dealer did do a transmission fluid flush and it still does the same thing daily.

11/25/25 DRIVING AT A SLOW SPEED, THE TRANSMISION WAS IN DRIVE. THE TRANSMISSION SLIPPED OUT OF DRIVE INTO NEUTRAL. THE CAR STOP. I PUT THE CAR IN DRIVE AND CONTINUED TO THE FINAL DESTINATION. 3 DAYS LATER IT HAPPENED AGAIN. TRANSMITION WENT FROM DRIVE TO 1 ST GEAR. I STOPPED THE CAR. I PUT THE CAR IN DRIVE. i CONTINUED TO FINAL DESTINATION. I FEEL VERY LUCKY THIS ALL HAPPENED WHEN THE CAR WAS GOING 5-10 MPH.

The contact owns a 2021 Buick Envision. The contact stated that while driving at various speeds, the Lane Change Alert with Side Blind Zone Alert malfunctioned. The contact stated that while driving at an undisclosed speed, the side-view mirror illuminated erroneously while driving near a guard rail. Additionally, the contact stated that the side-view mirror had failed to illuminate while there was a vehicle in the blind spot. The vehicle was taken to the dealer several times, but the cause of the failure could not be determined. The contact stated that while the vehicle was parked in the garage, the contact inspected underneath the vehicle and noticed that the bracket in the rear passenger's side bumper fascia had detached and was hanging by the wires. The vehicle was taken to the dealer, where the bracket detachment was related to the failure. The dealer determined that the entire rear bumper fascia, the mounting brackets, and the clips needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure and informed the contact that the dealer needed to contact the manufacturer for assistance. The dealer contacted the manufacturer and was informed that 10 percent of the repair cost would be covered. The failure mileage was approximately 53,000.

This has happened about 4-5 times now, car has approximately 17.5k miles. While accelerating attempting to reach speed limit, transmission has slipped out of gear and power to wheels is not happening. Have learned to switch into neutral and then drive and transmission will reorient and grab the appropriate gear and reengage the power to the wheels. This occurrence does not throw off any codes so it appears random. Took it to the dealer and they said it would be two weeks before their transmission guy could take a look at it and try to recreate. Since it is not throwing codes, elected to continue driving since it usually occurs in the 25 - 35 mph range.

The contact owns a 2021 Buick Envision. The contact stated that while stopped in traffic on the highway, while accelerating, the transmission started slipping and the vehicle jerked abnormally before starting to drive normally. The vehicle was taken to a local dealer where the vehicle was diagnosed, and the contact was informed that additional diagnostic testing was needed to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 34,950.

When driving 2021 Buick Envision, the windshield and side windows do not defrost with HVAC set to defrost mode. Service Climate system is displayed on dash. Vehicle was inspected by dealer finding replacement of HVAC case half housing required on 1/22/24 ( a year ago). GM (OEM) has been in contact but has failed to provide a solution after 1 year of trying to obtain a part from their system. This condition results in immediate fogging condition of all windows without warning presenting a visibility safety hazard for the driver and surrounding vehicles. Sorry GM, but a rag to wipe the window is not a good solution. It has been a year with no urgency from GM to remedy the issue. This is deemed a critical function for safety and GM does not take it seriously.