NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
107 reportsClear category filterMileage unknown · Sep 25, 2025
Service Brakes
my wife was driving and she got warning lights for "brake assist failure" "speed limited" and "Service ESC". Brake pedal went all the way to floor and she came to a rolling stop. She couldve been in a accident if there were vehicles in front of her and it was also near a school bus stop. We recieved the vehicle from the shop a w…
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my wife was driving and she got warning lights for "brake assist failure" "speed limited" and "Service ESC". Brake pedal went all the way to floor and she came to a rolling stop. She couldve been in a accident if there were vehicles in front of her and it was also near a school bus stop. We recieved the vehicle from the shop a week ago today for other issues. (onstar). Was also in shop at dealership prior to that for coolant leak, a/c failure and a loud humming noise. Also door latch to rear hatch.
NHTSA ODI #11689765
Mileage unknown · Sep 23, 2025
Forward Collision AvoidanceService Brakes
Started 09/17/25: While braking, a front-end clunk or thud occurs. Directly afterwards, a cluster of warning lights appeared including Brake, ABS, Collision avoidance/forward collision, and Stabile track stability control) Brake pedal is now inconsistent and soft. Every time the brakes are activated, the thud or clunk occurs. Wh…
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Started 09/17/25: While braking, a front-end clunk or thud occurs. Directly afterwards, a cluster of warning lights appeared including Brake, ABS, Collision avoidance/forward collision, and Stabile track stability control) Brake pedal is now inconsistent and soft. Every time the brakes are activated, the thud or clunk occurs. When I start the vehicle, I get warning messages of Service Brake Assist, Service ESC on the dash that I must acknowledge. Called Hendricks Chevy Columbia SC on 9/18/25. Told to bring into dealership on 9/19/25. Dealership attempted diagnosis but could not. They bled brakes and reset all warning lights. I drove car approx. 10 miles and symptoms reoccurred, including all warning lights and thud/clunk. Called Dealership again and told to bring into on 9/22/25. It is now 9/23/25 and they have not diagnosed it yet. I was assigned a loaner car for 5 days.
NHTSA ODI #11689166
Mileage unknown · Sep 19, 2025
Service BrakesUnknown Or Other
- Brake assist system failure -Electronic stability control alert - Brake pedal goes to the floor and car doesn't stop -Potential master cylinder malfunction due to faulty part. (See photo below). Safety of self and others put at risk as car became uncontrollable due to complete loss of braking power while driving. Dealership…
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- Brake assist system failure -Electronic stability control alert - Brake pedal goes to the floor and car doesn't stop -Potential master cylinder malfunction due to faulty part. (See photo below). Safety of self and others put at risk as car became uncontrollable due to complete loss of braking power while driving. Dealership has not notified yet due to long waiting of other vehicles undergoing maintenance (in my case 2 days at time of this report) Part hasn’t been inspected yet. Issue seems in line with similar incident referring to other 2025 and 2024 Traverse molels. Warning signs and alerts appeared only at time of incident (See photo below)
NHTSA ODI #11688425
Mileage unknown · Sep 19, 2025
Electrical SystemService Brakes
Dashboard started showing brake assist and esc needed service. Four lights lit up: brake, abs, traction, and collision
NHTSA ODI #11688367
Mileage unknown · Sep 17, 2025
Electrical SystemEngineService Brakes
the whole dashboard lit up with break and park indicator lit up in red on dashboard. warning flashed about automatic break system failure and ESC warning
NHTSA ODI #11687969
Mileage unknown · Sep 16, 2025
Forward Collision AvoidanceService BrakesCrash
I rear ended a car on 3/12/25, and my automatic emergency braking system light was on at the time. When my car was returned to me, I set the braking system off, so the light was still on, but when I tried to turn the system back on in June, the light came on and told me I needed to get it serviced. As it wasn't a priority to h…
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I rear ended a car on 3/12/25, and my automatic emergency braking system light was on at the time. When my car was returned to me, I set the braking system off, so the light was still on, but when I tried to turn the system back on in June, the light came on and told me I needed to get it serviced. As it wasn't a priority to have the automatic emergency braking system, I didn't take my car into the dealership until August 18, when 3 more dashboard indicators came on. The dealership stated they would be waiting on a part for my brakes, but it is on national backorder, with no ETA. It has been in the shop for over 4 weeks (it was dropped of 8/18, but lights came on 8/10).
NHTSA ODI #11687568
Mileage unknown · Sep 15, 2025
Forward Collision AvoidanceService Brakes
The dashboard lights for the Braking, ABS, Electronic Control System, and Forward Collision Detection systems have remained illuminated. The vehicle cannot be driven due to the potential of brake failure.
NHTSA ODI #11687375
Mileage unknown · Sep 12, 2025
Electrical SystemService Brakes
Several alerts came on, including ABS light, SERVICE ESC, SERVICE BRAKE ASSIST, ADAPTIVE CRUISE CONTROL UNAVAILABLE. Blind spot alert stopped working. Dealership reset everything but the issue came back within a few hours. They said it may have something to do with the brake system
NHTSA ODI #11686817
Mileage unknown · Sep 12, 2025
Service Brakes
The ABS break service warning appeared in the info screen. I have less than 3000 miles on it. The dealer said the car should not be driven. They had to order the parts, Master Cylinder, reservoir kit, etc. They also said there was a GM Bulletin on this issue.
NHTSA ODI #11686815
Mileage unknown · Sep 9, 2025
Forward Collision AvoidanceService Brakes
Master cylinder needing replaced confirmed by dealer. ABS. Traction control forward emergency braking system service lights appear on dash and the systems are disabled saying service soon. Adaptive cruise control disabled super cruise disabled.
NHTSA ODI #11686031
NHTSA investigations
1EA26006 · Electronic Brake Module Component Failure
Opened Aug 21, 2026 · No close date supplied
Status: open (inferred from source dates) · Service Brakes
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.
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