2025 GMC Acadia Owner Complaints

I have had my 2025 GMC Acadia Denali for 1 week with 336 miles on it. When I went to start it on the evening of [XXX], I felt the brake pulse. Then the dash lite up with message to Service ESC. The brake icon was lite up red and ABS was lite up yellow color. I took my vehicle to our local Jeff Fender GMC dealership the next morning. The service tech did a brake pressure test which passed. He cleared the codes. When I went out to leave the dealership, the codes came back on. The service tech said it is NOT safe to drive because my brakes can fail at anytime. Service said they need to replace the master cylinder. With this issue, my brakes could fail & a horrible crash could occur causing injuries and/or death. Service rep told me this has happened to a new Yukon too. My husband called the dealership in Lake City, FL, where we purchased the Acadia from & spoke to a service rep. He told my husband he has seen this in Yukons, Terrains & Sierra pick up trucks. This brake issue with the master cylinder should be a recall due to the potential dangers of a horrible accident that can occur if the brakes fail. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

4/11/2025

The ESC, ABS, and Traction Control, Yellow warning lights, BRAKE, Red Warning light. Diagnosis is ABS, module, and master brake cylinder bad 2025 GMC Acadia Denali, 1150 miles. No parts available because these are all needing work! People are having near misses and collisions due to this problem! Put a stop production order until these are fixed!

6/19/2025

The ESC, ABS, and Traction Control, Yellow warning lights, BRAKE, Red Warning light. Diagnosis is ABS, module, and master brake cylinder bad 2025 GMC Acadia Denali, 1150 miles. No parts available because these are all needing work! People are having near misses and collisions due to this problem! Put a stop production order until these are fixed!

6/19/2025

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.

6/24/2025

The driver and infotainment center is so dim during the day that it is dangerous to drive the vehicle. I have taken the vehicle in to the dealer 3 times and each time the dealer indicates that there doesn't appear to be a problem, but at no time to my knowledge have they taken the vehicle out into the sunlight, There have been 2 Software updates at the dealer and one OTA update so far with no improvement. The screens are so dim that there is no way you can tell what icons are there. If you try to do anything while driving, you are taking way too much time trying to look at the screens and as a result a serious and unnecessary amount of distracted driving is occurring. There is no way you could wear sun glasses and view the screen because it appears black. Don't open the panoramic sunroof or the problem is worse. Anti glare screen protectors make the situation worse. I have attached a document I provided to the dealer service department on my latest visit.

7/21/2025

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.

8/4/2025

The ESC, ABS, and Traction Control, Yellow warning lights, BRAKE, Red Warning light. Diagnosis is ABS, module, and master brake cylinder bad 2025 GMC Acadia Denali, 1150 miles. No parts available because these are all needing work! People are having near misses and collisions due to this problem! Put a stop production order until these are fixed!

6/19/2025

ABS, EBCM, Traction Control and brake lights on.

7/9/2025

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.

6/24/2025

At approximately 4900 miles, the brake master cylinder failed on my vehicle. It has been at the dealership for over a month awaiting parts for repair.

7/22/2025

After less than 500 miles, the right rear turn signal has failed. i think it is blinking but it is not. When changing lanes, other drivers have blown their horn at me.

3/25/2025

My 2025 Acadia Denali's Main tablet sized screen is impossible to view in bright daylight. This screen has controls for most of the vehicle's settings. If I want to change something such as the temperature setting, I can't see the proper button. This is clearly a safety issue as taking eyes off the road for an extended period just to make a simple setting change is a recipe for disaster. My dealer claims there is no solution as they are all like that.

7/8/2025

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

7/9/2025

Upon starting the vehicle the vehicle immediately starting moving while foot on brake and moved from park to reverse or drive. Unable to stop the vehicle in idle gear and no gas pedal applied. Power steering warning and no brake assist warning on the dash. Unable to stop vehicle within 20ft while traveling at idle speed. Vehicle lights and warnings have been reproduced and is currently at a dealership awaiting further inspection. Vehicle is available for third party inspection if needed. Vehicle at Barker Buick GMC, 6444 W Main St, Houma, LA 70360 on 8/4/25

8/9/2025

Transmission went out at 4,150 miles vehicle was having hard shifts and slipping

6/8/2025

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.

8/6/2025

bought car brand new at 427 miles car started bucking shaking pulsating while driving bought to brennen gmc plattsburgh ny at 811 mile did same thing but worse brought back to dealership they put camshaft actuater and solenoid in at 6041 mile car was motor started knocking stalling controlable in traffic back at shop

8/23/2025

I have the little feature that will brake for me if it thinks ima get in a wreck. However it’s glitchy!! I can be the only vehicle on road in BOTH directions, cruise set at 60 when out of nowhere the car slams on the breaks. We go down to like 52 then like nothing ever happened we are back to 60. This has happened several times. I have brought the car into my dealership tomorrow have the software updated and the camera recalibrated. Even after these steps were made this issue is still occurring. Happens about one to two times a week, so pretty often. My worries that I will be rear ended one day if this is not corrected.

10/27/2025

The antenna fin cover came off while driving down the road. I had been a possession of the car less than six weeks. I’ve contacted the dealership- it’s covered under warranty, but the part is backordered because it’s such an issue.

12/7/2025