Service Brakes Problems of Chevrolet Traverse - part 1

Was traveling down the road at about 45 mph and the dash started to show a brake assist failure error and alarm. The brakes would not work and nearly went through the intersection during a red light.

Brake monitor alert came on, car is only a year old, lots of people claiming same thing in the chevy owners group on fb.

See all problems of the 2024 Chevrolet Traverse 🔎.

My wife was driving and she got warning lights for "brake assist failure" "speed limited" and "service esc". Brake pedal went all the way to floor and she came to a rolling stop. She couldve been in a accident if there were vehicles in front of her and it was also near a school bus stop. We recieved the vehicle from the shop a week ago today for other issues. (onstar). Was also in shop at dealership prior to that for coolant leak, a/c failure and a loud humming noise. Also door latch to rear hatch.

The service esc, service brake assist came on. The abs light, brake light, crash light and lane assist light are all on. The dealership said it is the brake master cylinder and module with fluid that is the problem and it is on national back order.

My chevy has 3000 miles on it and the service the brake assist and service the esc information flashes on the screen and the brake and abs lights are lit up.

Started 09/17/while braking, a front-end clunk or thud occurs. Directly afterwards, a cluster of warning lights appeared including brake, abs, collision avoidance/forward collision, and stabile track stability control) brake pedal is now inconsistent and soft. Every time the brakes are activated, the thud or clunk occurs. When I start the vehicle, I get warning messages of service brake assist, service esc on the dash that I must acknowledge. Called hendricks chevy columbia SC on 9/18/25. Told to bring into dealership on 9/19/25. Dealership attempted diagnosis but could not. They bled brakes and reset all warning lights. I drove car approx. 10 miles and symptoms reoccurred, including all warning lights and thud/clunk. Called dealership again and told to bring into on 9/22/25. It is now 9/23/25 and they have not diagnosed it yet. I was assigned a loaner car for 5 days.

The whole dashboard lit up with break and park indicator lit up in red on dashboard. Warning flashed about automatic break system failure and esc warning.

- brake assist system failure -electronic stability control alert - brake pedal goes to the floor and car doesn't stop -potential master cylinder malfunction due to faulty part. (see photo below). Safety of self and others put at risk as car became uncontrollable due to complete loss of braking power while driving. Dealership has not notified yet due to long waiting of other vehicles undergoing maintenance (in my case 2 days at time of this report) part hasn’t been inspected yet. Issue seems in line with similar incident referring to other 2025 and 2024 Traverse molels. Warning signs and alerts appeared only at time of incident (see photo below).

The dashboard lights for the braking, abs, electronic control system, and forward collision detection systems have remained illuminated. The vehicle cannot be driven due to the potential of brake failure.

Several alerts came on, including abs light, service esc, service brake assist, adaptive cruise control unavailable. Blind spot alert stopped working. Dealership reset everything but the issue came back within a few hours. They said it may have something to do with the brake system.

Emergency brake engaged while driving in reverse causing the vehicle to abruptly stop 3 times leaving the driveway. This continues to occur as we left the house moving forward decelerating the vehicle. My [xxx] infants were in the vehicle causing them to scream, and this defect could have easily caused a crash. I no longer feel safe driving the SUV. We proceed to call the dealership we purchased it from (rick hendricks Chevrolet of naples) spoke with management the guys name was jack. He said this is an ongoing issues they are working on and told us to bring it in. I’m not driving this vehicle on the highway an hour away so we are now escalating the situation to headquarters. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Dashboard started showing brake assist and esc needed service. Four lights lit brake, abs, traction, and collision.

Front passenger caliber lock up.

See all problems of the 2023 Chevrolet Traverse 🔎.

Master cylinder went out with only 5400 miles.

The abs break service warning appeared in the info screen. I have less than 3000 miles on it. The dealer said the car should not be driven. They had to order the parts, master cylinder, reservoir kit, etc. They also said there was a gm bulletin on this issue.

The contact owns a 2025 Chevrolet Traverse. The contact stated that while driving at approximately 45 mph through a green light, another vehicle failed to yield at 50 mph for a red light due to being impaired, causing a collision in which the contact’s vehicle was t-boned. No warning lights were illuminated before the crash. The front and side curtain air bags failed to deploy. The contact reported that no injuries were immediately sustained, and no medical attention was provided at the scene. However, the contact was later transported to a local emergency facility and diagnosed with a back injury. A police report was filed. . The vehicle was towed to an independent mechanic, where it was diagnosed that the air bags, service brakes, and battery of the vehicle had failed and needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 13,000.

Went out for lunch and the following warning lights popped up on my dash, "brake", the abs light was lit up, service brake assist and service esc all popped up. Had my truck towed to lexington park chevy because it said it was not safe to drive.

Master cylinder needing replaced confirmed by dealer. Abs. Traction control forward emergency braking system service lights appear on dash and the systems are disabled saying service soon. Adaptive cruise control disabled super cruise disabled.

Normal evening running errands and brake pedal went to the floor, unable to stop and starting rolling into oncoming traffic. Put transmission in park, then reverse to get out the main highway and back to the service road, car would continue to roll. Service esc, service brake assist, engine light and more popped up on dash. Vehicle had to get towed. This could have been a very dangerous situation. Being told the master cylinder needs to be replaced. Part is ordered with no delivery date.

I was taking my daughter to school; we were about 5 minutes from our home. I came up to a red light and stopped no problem, it turned green and as I proceeded through the intersection to the next red light to make my left-hand turn to get on the freeway, my rearview mirror camara flickered and that was my first indication that something was wrong. After that the ac started turning on and off and my dash lights all started lighting up. Fortunately, I was only going about 15-20 mph, so I was able to get the car to stop without incident. I had a few seconds to decide what to do, I determined that making a u-turn when the light turned green was the safest option, that's when I realized I had no power steering. I was able to safely get the car back to my driveway and called a tow truck. The car is now at jk Chevrolet nederland, TX and now waiting to hear diagnostic.

Took my Traverse through a car wash and when putting the vehicle from neutral to drive, a slew of lights turned on (abs, traction control, check engine light). Car will be evaluated this coming week but all signs are pointing to the brake module and master cylinder as seen all over the internet and reddit. This is a serious, common issue with gm vehicles and something needs to be done ASAP about this.

Right rear brake light and turn signal are not operating, making an unsafe driving condition. Vehicle taken to dealership and parts on back order preventing unsafe condition to be corrected.

I purchased a 2025 chevy Traverse in April 2025. The car had under 1056 miles on it. I was in another state 325 miles away from home when lights came on in the car. The park brake came on, the abs light came on and a few others. The alert said, service esc, and service brake assist. What component or system failed or malfunctioned, and is it available for inspection upon request? we did research online and there were 33 other complaints from people with similar complaints. They reported that it was a master cylinder part and the dealers don’t have the part in stock. It could take up to two weeks for the part. How was your safety or the safety of others put at risk? my safety and my husband’s safety were at risk because we had to drive the car home. Our lives were at risk if the brakes failed. We took it to key motors a chevy dealership in s. Burlington, vt. He said they would have to diagnose it themselves and the part could take two weeks or more. We cut our vacation short and could not stay in vt that long. We are elderly and did not have enough medicine, not to mention the cost of hotels. The vt dealer said without the computer, the car defaults to the driver like a 1980’s car. We took our chances and drove it home. Has the problem been reproduced or confirmed by a dealer or independent service center? no, but many people online have complained of the same problem. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? we had it towed to our local dealership, bob johnson Chevrolet. They just sent us a bill for $214 for certified multi point vehicle inspection. I still don’t know what problem. Onstar diagnosed it as abs braking and stability diagnostic code; an issue has been detected in the antilock braking system. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no other warnings or symptoms before messages appeared.

Suddenly with just over 8300 miles on the vehicle, lights for abs, traction control, forward collision and parking brake all came on. The brake pedal started to feel spongy on the way to the dealership. The dealership replaced the master cylinder under warranty.

We have. 2025 chevy Traverse that we bought 10 days ago and it has 597 miles. I stopped at a location turned off the car. When I got back in to leave and turned it on, the brake light came on, and brake light, collision light, service esc and service brakes light. Apparently there are 4 or more gm cars in the dealership service department for over a month waiting for the part to fix this issue. The car is currently in the service department of the dealership we bought it from 10 days ago with no known date of fixing due to the national back order on parts.

On Aug 15th, 2025 I went to pick up my children from school. As I picked up my child and turned the vehicle on to go pick up my second child, the car notified me on the dash board of 4 icons. Brake, abs, traction and collision. Service esc and brake assist service needed. I was very concerned when I went to drive and when I gently eased into the brakes I could hear a small noise, every time I pressed the brakes. My second childs school is about 4 minutes away. I called Chevrolet dealership where I purchased it from in February, explained everything and they said I needed to take it in to a Chevrolet dealership near me. I called the nearest chevy dealership and they said to bring it in the same day or the next day. Saturday Aug 16th, 2025 at 8am I was at the dealership. They checked to see what codes ran up and if it was safe to drive, they pulled 4 codes and told me it wasn't safe and I needed to leave it for 10-14 days minimum. They said they could not provide me a vehicle / loaner. I had already called Chevrolet customer service the day before to receive assistance with a temporary vehicle as the dealership had told me they had no loaner to provide. I explained to Chevrolet customer service that I am a disabled & handicap veteran with children. I do not have a secondary vehicle and it is a necessity as I drop off and pick up my children and attend medical appointments. The employee was able to open a case for me and send it to the regional person around my area. No one has called me. Today Saturday, I dropped off my vehicle and picked up a rental according to the guidelines provided by the Chevrolet employee for reimbursement a gm vehicle under $44 a day. This is a huge inconvenience , unacceptable from a new 2025 vehicle. Ot has put me in a hardship position financially. The hassle, my Traverse has handicap plates and my rental does not. Very upset and frustrated. I need as much support and help from gm / Chevrolet to resolve this safety issue for my children.

Car had service brake assist warning along with 3 or lights on dadhboard. I was told master brake cylinder needs replacing.

On 8/11/2025 the brakes failed and the brake petal went all the way down. The check engine light came on as well as the abs, traction control, front collision lights. The service esc and service brake assist came on as well. It’s in the shop and needs a new brake master cylinder.

New vehicle (bought in April 2025), vehicle has about 6400 miles. The abs, forward collision braking system, traction and emergency brake services light all popped up (including alerts stating "service esc" and "service brake assist"). Took to the dealership and was told the master brake cylinder needs replaced. They said the part is on back order and no eta.

08/08/2025 brake system failure. Went through an intersection and was not able to stop. Dealer found internal leak in the master cylinder/hydraulic bpmv assembly. Warning lights and messages did not come on until the moment of failure. Had no warning before.

Brake assist, esc alerts on vehicle. Sat in the dealer service shop for 3 days and said to have been fixed. Still with same issue.

I was in the car wash and the service esc came on it also had the traction control, abs and check engine light came on. When I restarted my car the check engine light only came on . On the chevy app it says my anti breaking system needs serviced. This is a brand new car bought a couple months ago with under 3,000 miles.

8/4/25 vehicle was pulling from side road to main highway when lights and warnings came on dash cluster. Brakes were very soft and not very responsive, car was slowed down on its own. Was able to pull into a driveway and take photos of some of the messages. One said service traction control, one said service asc, and one said ‘brake assist fail, press hard to brake, speed reduced. After restarting car all was normal. 8/11/25. Sitting in some morning traffic and all the same messages came up and brakes were soft again. Was able to keep some distance between myself and other cars until I could get off the road. Immediately made an appointment for dealership service. After restarting car, all was normal again. Took car to dealership at appointed time and they kept it for a week and only did test drives to try and recreate problem. When they couldn’t they returned the vehicle to me with nothing done but clearing codes and checking for updates. This is unacceptable. I am hauling my precious grandchildren in a brand new vehicle that could have a braking failure at any time. Obviously braking failures can cost lives. There is a gm service bulletin for this exact problem in December 2024 (n242482170) requesting the master cylinder should be replaced. This service bulletin doesn’t extend to the 2025 Traverse model and it should as the problems are exactly the same. I hope this can be resolved. I’m very uneasy driving now and just keep wondering when this will happen again and how bad it could be.

When my new vehicle hit 4k miles, the dash started to show alerts for "service esc" and "service break assist". As well as those alerts, there were additional notification lights for "brake", "abs", "electronic stability control (esc)/traction control", and "forward collision alert (fca)". After some research, I was worried to drive my car incase the breaks would not work properly. So I discontinued to used my car with my 2 young children. The chevy dealership has confirmed it's the back master cylinder that needs to be replaced. From my research, this is a common issue happening and a roll over issue from the 2024 models.

We were told we had a faulty master cylinder that needed to be replaced. The abs, forward collision braking system, rear collision breaking system, and emergency brake were all at risk, which puts a significant risk to the passengers in the vehicle, including children. The problem was confirmed by the dealership with no information about timing of replacement since there is a national shortage of this part. Warning messages included abs, brake, forward collision, rear collision- lights came on several times. They appeared suddenly after turning on the car without incident. We tried turning off the car and letting it sit for long periods of time without resolution. The dealership initially flushed the brake line without resolution.