2025 Buick Envision

On April 11, 2024, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE24011 after receiving complaints concerning a loss of brake assist in 2023 MY Cadillac Lyriq vehicles. These complaints allege a hard brake pedal, followed by a “Brake System Failure” message at start up or while driving. GM shared records regarding several internal investigations for loss of brake assist due to alleged spindle fractures in the eBoost system. GM has stated that in the event of a spindle fracture, anti-lock brakes (ABS), stability control, and traction control remain functional until the vehicle comes to a complete stop. At this point, ABS, brake assist, stability control, and traction control functions are lost. The loss of these functions causes the vehicle to set one of three Diagnostic Trouble Codes (DTCs) based on failed performance criteria for the Electronic Brake Control Module (EBCM). These DTCs, in turn, activate several driver alerts: an audible chime, a visual “Service Brake System” message in the display, and multiple illuminated Malfunction Indicator Lights (MILs) for the ABS, Traction Control, and Brakes informing the driver of loss of functionality. The vehicle speed will also be limited to 70 KPH (43 MPH). Since opening PE24011, ODI has continued to receive reports of loss of brake assist. Some of these reports describe symptoms inconsistent with GM’s description of a spindle failure. These reports allege an immediate loss of brake assist functionality as opposed to the loss occurring after the vehicle comes to a complete stop. The sudden loss of brake assist during a braking event could result in extended braking distance, which increases the risk of a crash or injury. ODI believes further analysis is necessary to assess the potential for failures in GM’s eBoost system to resulting in safety-related outcomes. At this time, ODI is aware of the following vehicles that are equipped with this eBoost system: 2023-2026 MY Cadillac Lyriq, Chevrolet Colorado, and GMC Canyon; 2024-2026 MY Buick Enclave, Envision; Chevrolet Blazer EV, Equinox EV, Traverse; Cruise Origin; and GMC Acadia; 2025-2026 MY Cadillac Celestiq and Optiq. ODI is also aware of 2024-2026 MY Acura ZDX and 2024-2026 MY Honda Prologue vehicles that were built with this system. The Acura and Honda vehicles were manufactured by GM in a joint venture with Honda, and will be included in the Engineering Analysis as peer vehicles. ODI is opening this Engineering Analysis to further assess the safety-related consequences of a failed eBoost system. In addition, ODI is expanding the scope of the investigation to encompass all GM vehicles that share this eBoost system. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

At 1,578 miles, my 2025 Buick Envision would not start in my garage and had to be towed to the dealer. The check-engine light was on. The dealer tore down the engine and found a spun No. 1 main bearing. GM replaced the complete engine under warranty. The vehicle remained at the dealership from November 10, 2025, through January 6, 2026, totaling 57 days. A similar engine failure while driving could cause an unexpected loss of power. I do not have the failed engine; its current location is unknown.

NHTSA ID

11765466

Incident

Nov 10, 2025

Vehicle would not start, took a jump, all warning lights came on. I started to drive the car and all lights starting blinking. After shutting down, the vehicle again did not start. Towed it to dealer, been there for a week now, many modules had to be replaced including the Three times they said it's fixed, three times they called back to say it's not.

NHTSA ID

11764230

Incident

Sep 5, 2026

On XXX we were in the acceleration lane on XXX, merging onto the highway. When we engaged the cruise control the car rapidly accelerated up to 97 mph. We were unable to get car to slow down, or disengage the cruise for approximately 1 minute. The care ran for 97 mph for the minute or so this happened. Husband was driving and he did all we knew to do to disengage the cruise and get the car slowed down. After approximately 1 minute the car started to slow down. We immediately took the car to Kelly Chevrolet in [XXX]. We were told that General Motors usually doesn't do anything to help the consumer unless there have been 4 reported cases. (This happened one other time about 2 weeks prior, but we thought it was a fluke and didn't report it.) We had this car for 1 1/2 years with 22,000 miles. The warranty would repair, but I refused to drive it again, under the circumstances. We have since traded the car ini on another car as we couldn't drive it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11761118

Incident

Jul 28, 2026

I was driving ~72 MPH on the interstate and my car suddenly downshifted and the dash read “Speed limited to 62 MPH”. I took the nearest off ramp and the brakes completely failed. The dash initially read “service transmission” and “service breaks”. After restarting the Buick Envision, the MyBuick App diagnostics stated “service breaks” only. The car was towed to the dealership this date. I have not heard from them on what has caused the brake failure yet.

NHTSA ID

11746582

Incident

Jun 25, 2026

On [XXX], I started the car. Very loud, cracking noise came from radio. Turned off radio, noise stopped. When I used turn signal, noise came from turn lever. Turned off signal, noise stopped. Put car in park and pushed ignition button to turn off. Noise came thru ignition button. Later restarted the car, noise was gone. Concerned there is a power surge going thru system. Saw same problem for others online at [XXX] . Stated there that replacing amplifier corrects problem. Both dealer and corporate Buick are aware of problem. However, both are refusing to replace part, as car isn't making noise currently. One person on the forum stated he was unable to turn car off when problem occurred on his car. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11730768

Incident

Apr 10, 2026

While driving the dash and radio randomly turn off. Sometimes staying black for minutes others until you stop the car and walk away for several minutes. Leaving you without a way to tell how fast you are going, or any other safety information, fuel level or more.

NHTSA ID

11728950

Incident

Mar 28, 2026

While driving for approximately 2 1/2 hours with cruise set at 78. I did need to brake on occasion and then resume speed. For no apparent reason the car suddenly braked. Speed dropped to about 50 and then immediately resumed speed. No one was hurt. Things in the back seat pushed forward. I don’t know if it has anything to do with that incident but from them until I returned home, about 1 hour later my windows were fogging, I turned on the defrost about 3 times.

NHTSA ID

11726219

Incident

Mar 22, 2026

The contact owns a 2025 Buick Envision. The contact stated that upon picking up the vehicle from the dealer a day after purchasing the vehicle, while attempting to start the vehicle, the vehicle failed to start, with several unknown warning lights illuminated. The dealer replaced the battery; however, the failure persisted. The vehicle was taken back to the dealer, where it was determined that the failure was a parasitic battery drain. The contact was informed that the dealer was unable to verify what was the cause of the parasitic battery drain. The contact was informed that the engineer might need to inspect the vehicle. The vehicle was not repaired. In addition, the contact stated that the vehicle had been taken back to the dealer several times because of the failure. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 2,700.

NHTSA ID

11717823

Incident

Nov 13, 2025

Mileage

2,700 mi

This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

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

This preliminary information is to inform technicians and customers that GM is aware of the issue and the vehicle can still be driven. When a repair is available, this PI will be updated.

This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.

This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication

This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.