2025 GMC Acadia

I purchased the car on [XXX]. Drove the car about 8000 miles and then all of a sudden the dash lights all lit up for the brakes, ABS, traction control. I pulled the car over and turned it off. When I restarted my car, the lights continued to stay on and it told me to service immediately. I called my dealer and they could not get me in within 2 weeks so I took it to another local GMC dealer who could get it in to look at it that week. I took it in on July 9th, and then received a called a couple days later telling me that it had a bad Brake control module that they needed to order. A week later was told the part was on backorder. Two weeks later was told the part came in but it was still missing the brake master cylinder and reservoir. At that time, I was told the ETA was unknown and I have been calling back every week. On August 23rd I filed a complaint with GMC and have struggled to get anywhere with them. They tell me the dealer has the parts and the dealer tells me that they do not. I still have no ETA and it has been officially 2 months without a car. I am told that it is not safe to drive. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Approximately July 12 2025 while driving to dinner two warnings showed on the Driver Information Cluster (1) Check Brake Assist (2) Check ESC. Took vehicle to dealer the next business day for diagnosis. Service department stated the problem was the EBCM or Electronic Brake Control Module and the parts are on a Nationwide backorder. Since the part failure all brake system associated lights on the gauge cluster are illuminated and non of the associated safety systems are functional including but not limited to ABS, Stabilitrak, Lane Keep Assist, Adaptive Cruise, Crash Avoidance or standard cruise control.

At startup today vehicle displayed “Brake Assist Failure. Press Hard to brake. Speed limited.” It also displayed “service.” It also displayed “ESC,” and the word “service. An internet search indicated this may be a common problem of this vehicle, caused either by a software error in the Electronic Brake Control Module, or due to a defective brake master cylinder. There is a GM service notice for these defects, N242471431. Regardless of the cause, the brake is extremely mushy, and requires a high degree of force to stop the vehicle. GM says there is no recall due to this defect. This is a brand new vehicle and therefore it must be a defect in the vehicle. Given that braking is a fundamental safety issue, it’s hard to believe there is no recall already issued.

Car driven off the lot 06/14/2025 On Sunday 07/06/25 (21 days from purchase) while driving home from a 30 minutes away from home trip with 3 young children with me, the car gave multiple alerts and service warnings. "Service Brake Assist" and "Service ECS" Lights / Symbols related to the following were also displayed: Traction Control System (TCS)/ Electronic Control Stability Light, Anti-lock Brakey System (ABS); Brake System Warning Light, Forward Collision Alert and BREAK light I stopped the car immediately and pulled to the side of the road. After restarting vehicle, lights were still displayed and service alerts still on. Power steering was very diminished and the breaks were struggle to break. Acceleration was also impacted and every time I breaked it appeared as though the car was trying to accelerate. I was able to drive the car home slowly following back roads. On Monday 07/07/25 I called the dealership and arranged a tow to their facility. On Tuesday 07/08/25 after multiple "unavailable to take your calls" I was finally able to connect with a service technician who indicated the break master cylinder needed to be replaced. I was not given an ETA on the completion of this repair. I have owned the car for 21 days. It has 1073 miles on it!!! I have 3 young children! The original route home was via a very heavy interstate! What if the brakes failed me while driving an interstate! I praise God I was able to get home safely with my children

After having my 2025 GMC Acadia Elevation for 2 weeks, I turned it on and six lights on the dash lit up. ESC, ABS, Tractions Control and more. I was leaving a store at the time this happened and drove home. Also, my cruise control would no longer work. Took my Acadia to the dealership the following business day to be serviced, only to be told a week later that the master brake cylinder needed replaced. This part of course was on back order. My new part arrived two weeks later, only to discover that two additional one-time parts (seal and reservoir) are now needed. These parts are also on back order with an estimated ship date of mid to late July.