2024 Chevrolet Equinox EV

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 Chevrolet Equinox. The contact stated that while driving, the vehicle experienced phantom braking. The failure caused the brakes to lock up. The contact and the child seated in rear in a car seat sustained whiplash and seat belt bruises. The failure mileage was 50,500.

NHTSA ID

11769889

Incident

Jan 1, 2024

Mileage

50,500 mi

Driving at 50 mph car applies brakes for no reason

NHTSA ID

11747131

Incident

Jun 24, 2026

We have occasional issues with the car coming to a very abrupt stop for no apparent reason. Typically this will happen when going through an intersection or pulling into our garage. Auto braking has been disabled in the system settings for quite some time, and in fact, each time we get in the car we see a warning that forward anti-collision braking is off. This has happened twice withing the past 4 days and we have concerns that if it continues to be a more frequent issue it will cause an accident. I recently spoke with another GM owner who told me they are experiencing the same issue so I thought I should log a complaint to hopefully help instigate a recall/fix.

NHTSA ID

11727089

Incident

Mar 25, 2026

Automatic emergency breaking engaged while driving through an intersection when there was no danger or incoming car or need for it. If the car behind us was not paying attention they could have rear ended us.

NHTSA ID

11722528

Incident

Mar 6, 2026

I was driving South on interstate 55 near Arnold Missouri in adaptive cruise control mode at approximately 65 mph when the car braked suddenly and came to a complete stop on the interstate. Car would not go forward after stopping. Turned the car off and restarted and the car now would drive normally. Have not used ACC since and car has behaved normally. Took the car to dealership in Farmington, MO and they reported no error codes and no recalls. I had driven over 13,000 miles in the car without any incidents previously.

NHTSA ID

11706698

Incident

Dec 16, 2025

The contact owns a 2024 Chevrolet Equinox. The contact stated that while driving and attempting to reverse, the brakes unexpectedly engaged. There was no warning light illuminated. The contact received notification of NHTSA Campaign Number: 25V639000 (Forward Collision Avoidance). The vehicle was taken to an unknown dealer but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown.

NHTSA ID

11701736

Incident

Nov 26, 2025

My cars automatic braking system stops when there is no present need. It brakes with extreme force. It has happened multiple times to both myself and my husband while driving. The car stops and instantly I think I must have hit something that stopped the car. There isn't anything closer than 10 - 20 or feet away. this happens at a slow speed and is very startling. We took in in to the dealer yesterday and they told us they couldn't replicate it. It happened to my husband this morning again. I looked online to see if there are any complaints to which I saw that there have been numerous complaints. Some stating that this phantom braking has happened on the highways at speeds of 65-70 mph. The thought of that is so frightening. An accident with injuries or deaths could occur. Please look into this. Thank you

NHTSA ID

11696826

Incident

Oct 31, 2025

Backing out of a parking spot, no one around the car slams on the brakes and starts screeching! Scared the crap out of me and nearly gave me whiplash.

NHTSA ID

11696741

Incident

Oct 31, 2025

This Preliminary information communicates to the technician the direction needed when encounter a noise complaint for the rear disc brakes.

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

This Preliminary Information is to inform technicians to not replace any parts at this time and to use the work around provided. When a fix is available, this PI will be updated to a bulletin.

This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener and to replace the opener with a new updated part.

Service Update. Certain vehicles listed above may experience a condition in which the Anti-Lock Braking System (ABS) may be perceived as activating earlier than expected during certain braking scenarios on slippery road conditions, such as ice- or snow-covered surfaces. Dealers will reprogram the brake system control module and drive motor control module.