2021 GMC Acadia brakes problems

Filed Aug 25, 2026 · Brakes · TX

While driving the brake vacuum pump exploded leading to catastrophic brake failure. My husband was driving and was able to stand on the brakes to get the car to stop, but had i been driving, I am not strong enough to have stopped the car. I have 3 children with my youngest being 1. If this had happened with me and my kids, we could have had a major wreck and/or DIED! GM is aware of the brake vacuum pump issues but does not have a recall on the part. The braske assist light did not come on the dash until brakes were lost.

Filed Jun 26, 2026 · Brakes · WI

My brake pedal got stiff when I was driving. I had zero control of my brakes. I was informed by a GMC dealership that my BRAKE BOOSTER blew up causing my brakes to stop working and metal shrapnel to be sent into my engine. My 2021 vehicle is a complete loss. GMC has done NOTHING to help me.

Filed Jun 10, 2026 · Brakes · WI

I was driving and all of a sudden my break pedal was inoperable. It was stiff and unable to be used. Luckily I was only going 40 MPH. I pulled into a parking lot and my car started shaking and apparently the metal parts from the vacuum pump blew into my engine, which completely wrecked my engine. I nearly could have died and now my 2021 car is completely destroyed.

Filed Mar 30, 2026 · Brakes, Driver assistance · FL

On March 27, 2026, I experienced a complete brake failure while driving a 2021 GMC Acadia in a school zone at approximately 3:00 PM. When I pressed the brake pedal, the vehicle did not respond. I attempted multiple times, including using the emergency brake, which did not activate immediately. The vehicle remained in motion for several minutes in an area with children and parents present. The emergency brake only engaged after approximately 30–45 seconds of repeated attempts. I was forced to steer off the road to avoid a collision. The vehicle had been inspected at a GM dealership on March 16, 2026, just eleven days prior, where the brake system was evaluated and no issues were identified. After the incident, the dealership diagnosed a leaking vacuum pump, which is a component that supports the brake booster system. This failure occurred without warning and created a dangerous situation. I am concerned this may indicate a broader safety defect.

Filed Nov 16, 2025 · Brakes · IL

ABS Modulator failed leaking oil. Loss of braking Repair service found the same problem. Part was scrapped.

Filed Jun 30, 2025 · Acceleration, Brakes · GA

The Vacuum pump on my 2021 GMC Acadia failed causing my breaks malfunction. This Problem was confirmed by a certified mechanic that repaired it. this is in conjunction with the federal safety agency recall issued under N192268490.

Filed Apr 30, 2025 · Brakes · FL

I was driving down the road and all the sudden my breaks locked up. Like I had to stand on the break with both feet for it to barely stop. After getting it to the repair shop they said my vacuum pump exploded. My problem is it’s very well taken care of car and absolutely no warning light was on. I had no warning at all just all the sudden wouldn’t stop. Now I’m 7,600 in the hole because of this and very upset my not even 5 year old car is having these problems.

Filed Aug 17, 2024 · Brakes · NC

Front right brake hose was entangled around the front drive shaft and tore the brake line apart causing catastrophic brake failure. Car had only 19000 miles on the odometer odometer.

Filed Apr 27, 2023 · Brakes · OH

Breaks make loud noises when cold. OEM PADS and ROTORS. New with 8k of miles

Filed Apr 16, 2023 · Brakes · FL

Brakes will start Grinding on front wheels