2021 Chevrolet Tahoe: brake failure

Filed May 7, 2026 · Brakes · FL

I was driving home after dropping my kids off at school and when I was almost home my dash lit up with the traction control light, check engine light, ABS light, red break light, service ESC message, forward collision system unavailable message and break system failure 62 MPH top speed ( was switching between 43 MPH top speed and 62 MPH top speed ), I went to slow down and I had no brakes at all. The pedal sunk to the floor with zero resistance no matter how many times I pushed it. I live on a dead end road and thank god I had already crossed the major highway before my road because it would have been an incredibly bad accident. I finally got it to switch into neutral to stop and into park where I sat with my foot on the brake in park until someone could come out to me. I called my local dealership whom had it towed to them. My vehicle is a 2021 Tahoe with 23,014 miles at the exact moment this happened. The dealership said it was the master cylinder/brake module which is not covered under the power train warranty I still have. This is a major safety issue and it seems it is not isolated due to a simple google showing reports on other forums of other newer chevy/gms in different models have this same issue with brakes going out while driving.

Filed Mar 24, 2026 · Electrical · 114,000 miles · MS

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, there was a breach in communication with the OnStar system. The contact believed that the brakes failed, and several other safety systems became inoperable due to a failure with the OnStar system. The dealer was notified of the failure, but the vehicle was not diagnosed or repaired. The manufacturer was notified of the issue. The failure mileage was 114,000.

Filed Jan 27, 2025 · Brakes · 35,000 miles · AR

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving at an undisclosed speed, the brake pedal was depressed; however, the brakes failed to function as intended. In addition, the contact noticed a grinding sound and several unknown warning lights illuminated. The vehicle was taken to the dealer where it was diagnosed with brake master cylinder failure. The contact was informed that the brake master cylinder needed to be replaced. The vehicle was not repaired. The contact stated that the brake master cylinder had been replaced two times since October 2024 and needed to be replaced a third time. The manufacturer was made aware of the failure and a case was filed. The contact was provided a monetary discount towards the cost of the repair. The failure mileage was approximately 35,000.

Filed Aug 1, 2024 · Brakes · FL

I was driving with family (2 adults - including myself, and 5 kids - ages [XXX] ) The truck started to flash warnings and my brakes disabled. We couldn't stop and almost had an accident. I kept pumping the brakes and the E break I didn't give it any gas and we slowly came to a stop after some time. I shut the truck off as I was beyond terrified and tried to start it back up. The lights came on but it didn't turn over to start. Had to have it towed and find an uber for a 7 passenger car. The truck was towed to the nearest dealer (a little over an hour from my home) and I was told it was a battery issue. They replaced the battery didn't check the breaks and told me if the battery dies the breaks stop working. Yet, I had power in the truck just no brakes, when I tried to turn it on the lights went on as did the radio but that was it. I tried to take pictures of the warnings on the dash however we were in Mom panic mode. Chevy is acting as if this isn't an issue. I had to put out over $1,100 between the battery, the fees of the dealership, rental and an uber. If we were going at a higher speed we would have not been okay. It was beyond dangerous and the thought that if a battery suddenly dies you have no breaks, that is just unacceptable. I would love for someone to look into this. I am now looking to see what I can do as I don't feel safe in the truck. I don't want this to happen to anyone else hence why I am asking for someone to please look into this. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 17, 2024 · Brakes · ID

While traveling on the highway at 65 mph the car comes to a complete stop with no brakes applies. No engine light present nor were the emergency braking lights on. This is the 4th occurance.

Filed May 19, 2023 · Brakes · PA

I started my vehicle and I pulled it out of my garage. Whenever I went to push the brakes down before pulling out of my driveway, it seemed like the brake pedal was higher than it usually is because my shoe caught the edge of the peddle due to where I am used to feeling the top end of it to decompress it. sometimes I contribute that that to the type of footwear that I have on but I was wearing the same shoes I had worn driving the vehicle only 1 hour ago. I was not sure why that was but I kept pulling out of the driveway (maybe something was stuck to the bottom of my shoe?) I continued to pull out and drove up my road to the next intersection where there were vehicles in front and behind me at that point. As I approached the intersection, slowing down to 25ish mph, I decompressed my brake peddle and all sorts of messages about brake failure started to appear in my control center and the peddle went all the way to the floor without fully stopping the vehicle. It seemed to be able to slow the vehicle down but very so slightly. Luckily, the people ahead of me continued to drive forward and the road was going uphill so the vehicle slowed on its own due to the terrain, at which time, I advised my daughter who was in the backseat to hold on that I needed to put the car in Park while we were still moving slightly. We were slowed to about 2mph and I put the car in Park. I looked down at the brake peddle and there was a fliud that had leaked out on top my all weather floor mats (non absorbent). Luckily, we were not involved in a collision but it was only due to the terrain and the fact the people in front of me continued to drive forward. Otherwise, we would have hit them from behind.