2024 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.

The contact owns a 2024 Buick Envision. The contact stated that while driving 15-20 MPH, the brake pedal was depressed and the brakes failed to respond as needed, causing the vehicle to crash into a residence. The contact shifted into reverse(R), and the vehicle crashed into a porta-potty at a construction site. The vehicle shifted into park and stopped. The contact stated that the Driver Assist feature was operational during the failure. The contact sustained bruising and soreness to the right side of the body. The vehicle was drivable after the failure. The approximate failure mileage was 22,000.

NHTSA ID

11773950

Incident

Oct 24, 2026

Mileage

22,000 mi

The vehicle experiences a notched (hitching), sticky resistance at dead-center when driving over 55 MPH. It requires noticeable physical effort to break past the sticking point to both the left and right, causing jerky micro-corrections. Please check for any available reprograms or flashes for the Power Steering Control Module (PSCM), and check the electronic torque sensor calibration or replacement of steering rack and pinion. This is a safety issue.

NHTSA ID

11770843

Incident

Oct 11, 2026

After coming to a stop, I then put onto another road and several warning lights chimes came on in my car, including brake system failure. This is the second time this has happened in less than two weeks. A dealership said they fix the problem and then it did it again today I was traveling on a road with several other vehicles. Due to the braking issue, it took me a longer distance than should’ve taken to get my vehicle to come to a complete stop. My speed limit is limited in my car, which could also cause a danger due to the roads that I travel frequently.

NHTSA ID

11768201

Incident

Sep 30, 2026

The master brake cylinder failed. not once but twice. It is available for inspection at the dealership currently. I lost the ability to be able to stop my car and use my brakes. Luckily I did not hit anyone elses car as I had to pull off the freeway. This is a major safety and liability concern. Yes, the problem has been confirmed by the dealer. The vehicle has not yet been inspected by a GM engineer yet for the 2nd time it happend. No, the only watning signs that came on was when the failure was occuring.

NHTSA ID

11762993

Incident

Sep 5, 2026

Driving and open areas or in town car will automatically break. Multiple times over 45 miles an hour and lock up the brakes then accelerate car has been in and out of the dealership 7 to 10 times1 time for 10 months straight. Vehicle collision lights have come on for side rear and front collisions when brakes lock up and then accelerate we videoed and taken pictures showing no cars surrounding during instances. The last lockup cause injuries to my son and my wife’s neck. They are seeking medical attention today.

NHTSA ID

11751180

Incident

Jul 16, 2026

Same as in the other two complaints. At one year and approximately 5000 miles I personally did the first oil change. Car was approximately 3 quarts low on oil after draining the oil for the oil change. Filled up to manufacturers recommendation. Two months later and approximately 1000 miles on the car, the car was 1 quart low. GM has a bulletin on this very issue bulletin number 01–0 6–0 1–011N. Started oil consumption test through the dealer. Dealer stated the first remedy is replacement of a valve, followed by another consumption test. Next option is replacing the engine.

NHTSA ID

11731843

Incident

Apr 16, 2026

The contact owns a 2024 Buick Envision. The contact stated that while in reverse(R), the vehicle started rolling backwards and independently stopped. There was no warning light illuminated. The vehicle was taken to a local dealer, where an employee suggested disabling the parking brake. The vehicle was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 2,000.

NHTSA ID

11728798

Incident

Apr 2, 2026

Mileage

2,000 mi

Description of Safety Defect: While operating the vehicle at approximately 25-30MPH and make a right turn, the vehicle experienced a sudden and total loss of power/engine stall, accompanied by a "Check Engine" light and a "Reduced Engine Power" notification. This resulted in a near-collision on a public roadway. The vehicle's steering and braking response were significantly compromised during this event, creating an immediate life-safety hazard for the driver and passengers. Dealer/Manufacturer Response: The vehicle was recently in the possession of McGovern Buick GMC Westborough for service. Despite the vehicle exhibiting an active Check Engine Light (CEL), the dealership staff pressured the consumer to take delivery of the vehicle and drive it on public roads. The service advisor admitted in writing that the CEL was active but insisted the vehicle was "feel free to drive." Furthermore, the dealership attempted to falsify internal corporate safety notes to claim the consumer "insisted" on taking the vehicle, masking a known mechanical defect. This represents a willful suppression of a safety defect by a franchised dealer, which led directly to a hazardous operating condition. Injuries/Crashes: No crash occurred, but a near-miss was documented. Passenger experienced severe emotional distress due to the sudden loss of vehicle control in traffic.

NHTSA ID

11725228

Incident

Mar 15, 2026

This Preliminary Information provides diagnostic tips and guidance for situations where key fobs cannot be learned or programmed successfully.

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3

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

• Improved emissions system diagnostics to reduce unnecessary check engine light activations

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

• More responsive map controls when switching views • Trailer Theft Alert settings are saved between drives • More reliable access to on-screen controls for temperature, fan speed, and heated seats • Improvements that help prevent the center display from freezing or unexpectedly losing audio