On October 23, 2026 at about 7:25 AM, while my wife was driving our leased 2025 GMC Acadia (20,773 miles) with our son in the car, the vehicle displayed 'Brake assist failure. Press hard to brake. Speed limited.' The ABS and traction control warning lights came on and the brake pedal became very hard to press due to loss of brake assist. No crash or injuries occurred. This failure matches the eBoost electronic brake control module issue under the federal safety agency Engineering Analysis EA26006 covering 2024-2026 GMC Acadia. My wife is afraid to drive the vehicle. The vehicle is currently at the dealer for repair. I am requesting that the federal safety agency record this incident and that GM be required to remedy this safety defect and release us from the lease.
2025 GMC Acadia brakes problems
41 complaints (59% of all complaints for this car). 1 crash reported.
- owner complaints
- 41
- of this car's complaints
- 59%
- crashes
- 1
- recalls
- 0
Which part fails
Owners did not name a specific part.
At what mileage
Complaints by mileage at the time of the problem.
GMC Acadia brakes problems in other years
Specific symptoms reported on the 2025 GMC Acadia brakes
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
Related investigations
Electronic Brake Module Component Failure
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
EA26006
What 2025 GMC Acadia owners say
Most recent owner complaints, unedited.
I was driving my car and my brakes felt weird. Then warning lights came on and my car told me that my brakes weren’t working and I would need to push them hard to stop. I put on my hazard lights and turned into a side street and was able to safely stop in the parking lane next to the curb. I shut my car off and then turned it back on. At that point, everything looked normal except for the engine light was on. I started driving again and within less than five minutes, the brakes went out again. I again was able to make it to a side street and stop, but was in a no parking zone. I was able to slowly make it into a parking lot and safely into a spot.
While driving my 2025 GMC Acadia, the vehicle experienced a sudden and severe failure of the brake master cylinder assembly, causing a significant loss of hydraulic pressure and braking assistance. Multiple dashboard warnings illuminated simultaneously, including ABS and brake system alerts. The brake pedal feel altered abruptly, drastically increasing the required stopping distance and creating an immediate collision hazard. The vehicle is currently grounded at a certified GM dealership awaiting a total replacement of the defective master cylinder assembly under factory warranty. Mileage at the time of failure was 19,000.
Dropping my children off at school, 4 lights came on on the dash. Two messages came across my dash as well. Service esc service abs. EBCM master cylinder needed to be replaced at local GMC dealership.My brakes were failing…This is a known safety issue by GMC and there’s no recall!
I was driving my 2025 GMC Acadia Denali on [XXX] with cruise on. Suddenly sound and banner notifications were telling me that I had no brakes. I immediately hit brake to break cruise and vehicle went faster. I managed to get cruise off from steering wheel. Put flashers on and took foot completely off gas. I was very fortunate that I didn’t hit someone or that no one hit me. After about 2 miles, I was able to pull in an empty church parking lot and get stopped. After getting stopped I was 2.4 miles from [XXX]. I was towed to GMC dealership in Montgomery, AL and diagnosed with defective master cylinder and no brakes. Very concerned because GMC has not issued a recall because the master cylinder failure has occurred many times before. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Today, June 11, 2026, my wife and 9 month old baby were on their way home from running errands in town when the vehicle started to violently shake, becoming frightened my wife tried to apply pressure to the brakes. When she pushed down on the brake pedal nothing happened and the pedal hit the floor. Our brand new 2025 GMC Acadia AT4 had just suffered catastrophic brake failure. So she pulled off onto the side of the road in hopes the uneven terrain would slow her down just enough to put it into park. Luckily enough it did. If it would have been 10 seconds later she would have been on a one way bridge where the speed limit is 60mph with no brakes. Four days prior to today on June 07, 2026 I sent a message to the individual that I bought the car from at the GMC dealership and told him that we had warning lights come up on the dash. He had me try and reset the screen but nothing happened. I asked when we could get it into a shop so it could be looked at he said that he would have someone reach out and schedule a time. I proceeded to ask if we were ok to drive the vehicle until then.To which he responded "If the vehicle isn't giving you issues mechanically, you should be good". Fast forward to today June 11, 2026 my wife is driving and has catastrophic brake failure. The vehicle was then towed by roadside assistance to the GMC dealership.
Telematic Modular Control is not working properly and part is on backorder. Dealership and GMC have refused to put into writing that my vehicle is safe to drive; however, they are refusing rental vehicle while awaiting arrival of part. Several of my safety features are not working correctly, my left turn signal went out randomly and my auto breaking has activated when there has been nothing near my vehicle.
The master cylinder failed under 10,000 miles. I was at 5000 miles. I am reading a lot of people have had issues with the master cylinder in the 2024 early 2025 models. Luckily I was in the driveway barely moving, but man if i were on a highway and it happened it could've been fatal!
When backing out of a parking spot of a store , I went to stop and pressing on the brakes nothing happened and I kept rolling backwards. I looked down to confirm I was pressing the brakes and my foot was on the brake pedal pressed firmly. I rolled to a stop put it in drive and checked the brakes and they worked like normal. I made an appointment at the dealership and had an appointment the next day. The said it did not have any codes, it preformed normal and passed inspected so there was nothing they could do about it.
Brake module malfunction Codes: “service ESC” “break assist failure. Press hard to break. Speed limited”
Questions about the 2025 GMC Acadia brakes
Does the 2025 GMC Acadia have brakes problems?
Owners have filed 41 complaints about the brakes of the 2025 GMC Acadia, 59% of all its complaints, more than any other problem.
At what mileage do 2025 GMC Acadia brakes problems start?
Not enough complaints include the mileage to tell.
Was there a recall on the 2025 GMC Acadia brakes?
There is no recall for this problem on this model year.
What year does the GMC Acadia have bad brakes?
The GMC Acadia model years with the most brakes complaints are 2025 (41 complaints), 2017 (36 complaints) and 2008 (31 complaints).
Other 2025 GMC Acadia problems
Driver assistance 22Engine 7Lights 5Electrical 4Steering 4Transmission 4Acceleration 3Body 2Visibility 1
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