2025 CHEVROLET TRAVERSE Service Brakes Problems

The contact owns a 2025 Chevrolet Traverse. The contact stated that while her husband was driving at 30 MPH on an expressway, occupied with his wife in the vehicle, seated on the front passenger side, attempting to depress the brake pedal, the vehicle failed to respond as intended, causing the front end of the vehicle to crash with the rear end of the vehicle in front. The contact mentioned that the brake pedal felt abnormally hard and excessive force was applied; however failed to bring the vehicle to a stop, causing the crash. The air bags did deploy. The vehicle was towed to a tow yard, the vehicle was then towed to the insurance company. The contact stated she and her husband did not sustain any injuries. No medical attention was required. A police report was filed. The manufacturer was not notified of the failure. The approximate failure mileage was 2,000.

Mileage: 2,000

Driving home - what looked like warning indicators on the dashboard, came on. Lost the ability to brake. Had to push the pedal all the way to the floor to get some braking to happen. A message came on the dashboard “Brake Assist failure. Press hard to brake. Speed Limited”. Once we were able to stop. We turned the car off. then turned it back on. We saw a message on the dashboard to “open the drivers door” and then “roll down the drivers window”. We did that and the car seemed to be normal again

Driving home coming up to a traffic light - I turned left onto Rd - After turning lost the brakes. Saw message on dashboard along with many others indicators as well. Saw the same message as the previous time ““Brake Assist failure. Press hard to brake. Speed Limited”.

Emergency braking occurs at random, even if I'm the only vehicle / object on the roadway. This has been ongoing and has been to the dealership three times. It starts back up each time the vehicle gets an update. Adaptive cruise will brake hard due to false emergency braking, but does not always stop accelerating at the set point (has gone as high as 20 mph over the set point previously and brakes would not respond during). Vehicle was not starting and "press brake to start" warning was showing even though brake pedal was pressed. Brake master cylinder had to be replaced along with brake module. When picking the vehicle up afterward, warning light came while vehicle was warming up "service brake assist" and then shortly after the yellow-circled ABS dashlight came on. Dealership said this was a new problem and separate from the brake master cylinder and brake module.

Beginning in May 2025, my 2025 Chevrolet Traverse began exhibiting a false “rear liftgate open” condition when the liftgate is fully closed. This defect triggers a continuous audible alarm that occurs before every drive and persists for the entire duration of the drive, stopping only when the vehicle is turned off. As a result of this defect, the rear windshield wiper and washer are disabled, eliminating rear visibility during rain and snow. The vehicle alarm system also cannot be armed, creating a security risk. The continuous alarm causes significant driver distraction, and the loss of rear visibility impairs safe operation of the vehicle, particularly in adverse weather. Minor children are frequent passengers, and the defect has occurred while they were in the vehicle. The vehicle has been presented to an authorized Chevrolet dealership on four separate occasions for the same issue. Multiple repair attempts, including diagnostics, software updates, component replacement, and latch assembly replacement, have failed to correct the defect. Because the alarm cannot be armed, the vehicle was left unsecured and was subsequently broken into, resulting in theft of personal property. General Motors has been notified and declined repurchase, directing me back to repeated diagnostics despite the unresolved safety-related defect. Problem Category: ☑ Electrical System ☑ Visibility / Wipers ☑ Warning Systems ☑ Vehicle Safet

2025 Traverse ABS brake system failed, and master cylinder broke at 12K. All of the safety features, Lane Departure, Forward Crash detection, blind spot, automatic braking system all stop working with no signs that it was failing! Extremely unsafe! Traverse are meant to be family vehicles, well with major functions failures this kind of problem is going be recipe for disaster if not recalled ASAP.

I started the vehicle to move it to a different place in my driveway and after putting it in reverse, it notified me that the ABS was not working. I could not stop the vehicle without pressing the brakes very hard and even then it was still rolling backward slowly. I quickly put the vehicle in park before the car rolled into my house.

My brakes, abs, front collision, esc light are on and dealership continue to try to fix and no luck. I have take 3 times in the last week with no luck. I need this fixed because I bought for safety features and now I have no vehicle to drive to work.

Vehicle leaked a large amount of transmission fluid because it had loose pump bolts per a GM/Chevy bulletin. The vehicle has shifting problems and vibration issues. The vehicle has done in multiple instances phantom braking. It has happened while parking and while exiting praking spaces and once on the Florida state road 924. Driver was able to maintain control of the wheel and avoid a collision.

Brake assistance failure. Brakes failed! ESC SERVICE I was able to set it up for inspection Could of caused a accident hurting other people or hurting my family, I use this vehicle to transport my 2 babies Vehicle would not brake properly could have cause serious injuries For my vehicle not yet has not been inspected it was towed, from what I have heard from current Traverse owners they have experienced this same issue with even lower milage No warning lights no indications of failure just happend instant twice

On July 16, 2025, with 4,514 miles on the odometer, the dashboard displayed warning messages for “Service ECS” and “Service Brake Assist,” along with illuminated indicators for BRAKE, ABS, and Traction Control. At 4,598 miles, the master cylinder was replaced. However, after installing a new brake master cylinder, power brake booster, and Electronic Brake Control Module, the brakes failed. As a result, an independent certified dealer had to reinstall all components to address the issue.

Brake booster failure, master brake cylinder failure

We drove the car to the store and everything was fine we went in to shop. We came back out and I turned the car on and my dash board had lights on. My brake light will not turn off . My ABS light is on. My forward collision light is on .. I am getting a notice to service ESC, and a separate one saying service brake assist . I ran a onstar diagnostic and it came back everything is good. I have not brought it into the dealership yet for them to look at it I will be calling . I have multiple children and I was so scared my brakes were fulling going to give out on my 20 min drive home. I couldn’t imagine what would have happened we could have hurt someone else on the road and ourselves.

I was driving down the road with my 4 year old son in the back and I went to stop at a stop sign and my car immediately lost brakes, the brakes went down to the floorboard with almost little to no stopping of my car. Then I had 3 warnings on my dashboard I can send pictures of them, my check engine light came on, my abs light came on and my traction control light came on. Very scary and something needs to be done about this

The 2025 Chevy Traverse was purchased on 10/27/25 - new. On the morning of 10/31/25, several lights came on for service such as the brake, ABS, traction control and forward Collison. Through a quick google search, saw there are many issues with the master cylinder leading to brake issues. At this time, the car only has 535 miles. Prior to this incident, the car had no evident issues. I contacted my local dealership to set up an appointment to have the issue assessed and fixed. The appointment is scheduled for 11/5/25. I will not be able to drive the car in the mean time, as it poses a safety concern (brake failure) to my family and myself.

While driving our 2025 Chevrolet Traverse with 9450 miles at 45 MPH, it suddenly came to a complete stop and would not advance. Eventually after restarting the vehicle it would drive again, but the ABS, collision avoidance, traction control, and emergency braking was disabled. We learned that the "master brake cylinder" failed. This requires a repair and the parts are backordered. Furthermore we learned this is a known common issue and there is a service warning for the 2024 Traverse and there is now a class action lawsuit. It apparently is also common on the 2025 traverse. This is a potentially dangerous situation that apparently is common and should prompt an immediate recall and replacement with a new and redesigned part. There are numerous reports of similar incidents and per the dealer this is a common repair.

I started my car last Sunday afternoon (10/26/25) and it began to alert me with tones and flashed on my dashboard "Service Brake Assist" and "Service ESC". Prior to that I drove it earlier that morning and it was seemingly working fine. Took it to the dealership the next evening (Monday, 10/27/25)for them to look at the following day (Tuesday, 10/28/25) and was told they were still looking into it. They just contacted me today (Wednesday, 10/29/25) that it is the brake master cylinder that had failed and that I should not drive it and they offered me a rental car.

front collision system failed. ABS and traction control are now failing. My breaks gave out Yes No The failure happened the day the warning lights came on - 10/26/2025

The master cylinder and ABS braking system failed, rendering the vehicle inoperable and leaving my family stranded approximately 285 miles from home. This represents a serious safety defect, as the braking system malfunctioned while the vehicle was in operation. The dealership has confirmed the issue, and the vehicle has remained in their possession for over two weeks awaiting parts and repair. During the failure, multiple warning indicators illuminated, including the ABS, Service ESC, and brake system lights. Once the brake system engaged, I was unable to release it or drive the vehicle any further.

My traverse breaks gave out while going to pick my kids from school. I cannot safely drive my vehicle. Master break cylinder needs replacement,

a week after purchase with less than 300 miles and 5 days the ABS, Trac Control, ESC, lights came on.. The same TSB known to the 2024 Chev Traverse are happening to my car, the same parts suggested in that TSB are what I am being told is being replaced in mine... The TSB I found includes 2025 Buick Enclave and 2024 Traverse. Seems the 2025 is probably having the same issue. The brakes did not fail but the lights remained on, the sealer advised the car was unsafe to operate until the parts were replaced. I am in a loaner car under factory warranty of course but I think the TSB should be expanded to include 2025 Traverse as well.

Service ESC & Brake Assist lights came on after only 4 months with the vehicle. The vehicle also abruptly slammed on the automatic brakes when backing into a parking spot with no obstacle present prior to the service lights indicating any issues. The vehicle was diagnosed with a failed brake master cylinder nearly two weeks ago, but the part is still on national backorder and will be stuck at the dealership for an undetermined amount of time with no loaners available. There are plenty other accounts of this same issue happening to other newly-bought '25 Traverses, and the N242482170 bulletin related to the '24 model hints at this being a recurring issue. This safety issue on a brand new vehicle without recognition/resolve is unacceptable.

On September 30 I was on my way to work as I was merging to join a busy highway my breaks failed to work. I had to press them really hard but it took for ever to yield. I made hand signals to the cars I was about to strike and they were able to break before I hit them as I was merging. When this happened 3 service lights appeared. Service ESC system, Break assist failure. Press hard to break.Speed limited. Key missing, check for key. i had an appointment for a cracked windshield on Friday the 3rd and Richland Chevrolet in Roswell. I took my traverse in on Wednesday afternoon and never heard back from them. on Monday October 6 I called and they advised me that my car needed a master cylinder and it was on back order. They said they could not give me an ETA because they have no idea when it will be available. They do not have a loaner because I did not purchase the vehicle their so I called the dealership where I bought it and they cant help me either.

Warning light ‘Service Electronic Stability Control’ appeared 2 days ago. Vehicle feels unbalanced, steering wheel has excessive play (like driving a boat), and control is compromised. Mileage over 10,000. Safety concern due to difficulty handling.”

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.

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.

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.

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.

Started 09/17/25: 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.

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

- 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 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

I rear ended a car on 3/12/25, and my automatic emergency braking system light was on at the time. When my car was returned to me, I set the braking system off, so the light was still on, but when I tried to turn the system back on in June, the light came on and told me I needed to get it serviced. As it wasn't a priority to have the automatic emergency braking system, I didn't take my car into the dealership until August 18, when 3 more dashboard indicators came on. The dealership stated they would be waiting on a part for my brakes, but it is on national backorder, with no ETA. It has been in the shop for over 4 weeks (it was dropped of 8/18, but lights came on 8/10).

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.

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.

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

Master cylinder went out with only 5400 miles

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.

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.

Mileage: 13,000

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.

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

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

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.

When putting my vehicle in park it jumps forward about 1 foot. This happen about 70% of the time when I shift into park. Also, my vehicle will brake randomly while driving. This happened one time on the freeway where my car came to a complete stop, luckily there was no one driving close behind me. More often this occurs while backing out of my driveway. My vehicle is available for inspection at any time. These problems are concerning because if my car jumps forward after being placed in park, I could potentially hit a vehicle parked in front of me or a person walking by. The braking while driving is very scary, especially since I was on the freeway and it could've possibly resulted in a serious accident. I took my vehicle to the dealership, and they had it for several days. When I picked it up, I was told that they were unable to recreate the issue of the car jumping forward. Regarding the braking while driving I was told that "a bulletin had been issued for this problem but since there is currently no fix, we advise the safety features be turned off." The mechanic then went on to say, "I'm unable to turn these features off because it would be a liability, but I can show you how." I spoke to the head of the service department the next day because I am scared to drive my young children around in this vehicle and was told that the braking sensors are just sensitive. At this point I'm not driving the car for safety reasons. No messages come on when the vehicle jumps forward after parking. When the vehicle brakes completely while driving I've seen the message saying once "obstacle detected" but other times I've been so startled I don't look at the dash, I'm more worried about getting hit in that moment. I did notice my seat vibrate every time this has happened. This all began shortly after buying my vehicle in February 2025.

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.

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.

Four weeks after purchasing the vehicle the anti-lock brakes light, traction control and forward collision lights all came on. I took it to the dealership and was told this is a known issue with the master cylinder. My car was there for 13 weeks.

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.

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.

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.

Brake light, ABS light, Forward collision light and Traction control light all come on when the car was started. Had to be towed to Woody Folsom dealership in Baxley, GA and is currently still there. Was told it was the brake master cyclinder and it is on nationwide backorder. The part came in this week and they put it in and could not get the car to program. They are waiting for another brake master cyclinder to arrive. So I am at 8 weeks of the car being down and in service at the dealership with no estimated date of when and if it can be fixed. I have received Onstar notifications that says A critical issue with the engine and transmission system in your 2025 Chevrolet Traverse has been detected. The battery in your 2025 Chevrolet Traverse is critically low.

August 6, 2025 I was driving and it started to rain and there was a little rain on the road and my vehicle appeared to be hydroplaning. I had never experienced that before and it scared me to the point that I reduced my speed significantly. I arrived at my destination and was there for about three hours and when I started my 2025 Chevrolet Traverse I had 4 lights come on my dashboard along with a warning chime. The lights were the BRAKE LIGHT, ABS LIGHT, FORWARD COLLISION ASSIST LIGHT AND TRACTION CONTROL LIGHT; and a Service ESC and Service Brake Assist message popped up in separate boxes from the lights themselves. I turned off my Traverse and hoped it was some fluke thing and again the same lights came on and same messages. I drove my vehicle home cautiously and parked it. I called the dealer I purchased it from the following morning and was given a service appointment 11 days out and I stated that was unacceptable since I was not sure the vehicle was safe to drive from everything I was reading online. The service dept stated that they could place it on a machine if I stopped into the dealership and let me know if was safe to drive. My husband drove it to the dealership 25 miles away and wasn't happy with the service department and spoke to a manager and he stated they would look at my vehicle the following day and gave me a loaner. My husband advised the manager that everything I had been reading pointed to an issue with the master brake cylinder and the parts are on backorder and the manager said he hadn't heard of any issues with them. I received a call 4 days later after asking the status of my new car repeatedly and was told that it is the master brake cylinder and a couple of the parts are on backorder and they don't know when they will arrive; could be a week, two or a month. I am extremely concerned about the seriousness of this issue and the lack of parts to repair the vehicle. As I stated, there are multiple incidents on google over this same issue.

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.

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.

Started car and began backing up when ECS, Brake, and ABS messages came up. Upon attempting to break at slower rates of speed it felt like the brakes would slip slightly before catching and stopping. At normal rates of speed (25+) it wasn’t noticeable. In shop now with ‘censor failure’

ABS and ESC and brake lights came on. Collision beeping and warning went out. Brake pedal vey late to respond to braking. This vehicle is unsafe. It has been sitting and the Chevy dealer for 2 weeks now with no information given to me about when it will be fixed. I call the dealer every other day and they just say that Chevy will be shipping parts. This is clearly a nation wide problem with this vehicle. I’ve read numerous articles online about people with the same problem and have contacted an attorney

I purchased a 2025 Chevrolet Traverse and experienced a complete failure of the master brake cylinder approximately two months after purchase. The brake system failed as I was operating the vehicle, creating a significant safety hazard. Fortunately, no accident occurred, but the car became unsafe and was in the dealership service center for 5 weeks awaiting repair. This failure occurred with very low mileage and without warning. I am concerned that this may be a manufacturing defect or part of a wider issue. The extended service delay also caused major inconvenience and out-of-pocket expenses. I am submitting this complaint so the NHTSA can track similar reports and investigate if necessary.

Brake master cylinder ECU failed. Illuminated warning lights for BRAKE, FRONT END COLLISION AVOIDANCE, ABS, and ELECTRONIC STABILITY CONTROL. Took the vehicle to dealership and was told about the part failure. They advised that there was no ETA on parts that are on backorder. The codes were removed and the warning lights went off, but came back on the next day. I was told that the vehicle was drivable, but they could not guarantee my safety. The dealership had no loaners so I had no choice but to drive the vehicle home.

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

Master cylinder failure

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.

While driving my 2025 Chevy Traverse with under 2,000 miles on the odometer, multiple brake-related warnings suddenly appeared on the dashboard, including: Service Electronic Stability Control, Brake Assist, Brake System Warning, and Anti-lock Brake System (ABS). I brought the vehicle to the dealership for diagnosis, where the issue was confirmed. However, I was informed that the replacement part is currently on back order, with no clear timeline for availability. I immediately contacted GM for assistance and was informed that the issue was due to a defective Brake Master Cylinder (part number 85762161). After further research, I discovered that a defective master cylinder can result in partial or complete brake failure, posing a serious safety risk. Given the extremely low mileage and the critical nature of the affected component, I believe this issue warrants investigation. I am concerned that similar failures may be occurring in other 2024–2025 Chevy Traverse vehicles and could lead to dangerous situations if not addressed promptly.

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.

the car had a faulty door that would stick intermittently since the day we purchased it (march 10, 2025) and wouldn't open unless forced. we reported the issue on march 23rd to our sales rep (jorge) and didn't act upon it until two months later when it wouldn't open at all. upon bringing it into the shop on may 27th it was determined that there was a faulty latch. they also discovered that the brake light was on and the car was in need of multiple components - master cylinder, the adapter and the reservoir. we have had a rental car since 5/27/25 and yet to receive our car back.

Parked the vehicle a Saturday evening went to get into it Sunday morning and the dash was lit up with abs light, service ESC, traction control, check engine light. Called the dealership I bought it from to tell them what was going on, brought it in on a Monday evening to be looked at Thursday. Was called to be informed the master cylinder went bad. Was told by the service manger part would be in to be fixed Wednesday. Wednesday came and gone with no call, finally got a call Thursday evening that the part did not arrive and NOW they have no ETA on the part.

While driving the automatic brake assist failure light came on. I was unable to stop at a very busy intersection and was forced into traffic even though I had a red light. The parking brake, engine light, and light came on.

Warning codes - Service Brake Assist, Service Electronic Stability Control (ESC), Forward Collision system unavailable. Brake pedal felt different with an associated clunk noise. Brake Fluid believed to have been leaking in garage. Dealer diagnosis as Master Brake Cylinder failure. No parts available/no ETA available. Car is 5 months old and under 5,000 miles on the odometer.

I started my Traverse and the brake light, forward collision alert, brake assist, stability control lights came on. The warning messages to service ESC, and service brake assist also came on. I have 2182 miles on my vehicle. No warning of anything wrong before this happened. It is available for inspection. It was towed to the closest dealership who determined the master cylinder needed replacing. I did not drive it due to warnings the brake systems were not functioning properly. Could have caused a wreck if they did not work. It has since been towed to the dealership it was purchased at awaiting their diagnosis. The first dealership said the master cylinder is on backorder with no ETA.

Our 2025 Chevrolet Traverse experienced a brake system failure on July 17th. We took the vehicle into the shop with the following errors on the screen: Service brake assist Service ESC Forward collision system unavailable My wife and children were in the car when the incident occurred. We have a 20 minute drive, through traffic, to the nearest dealership. At any point, the brakes could have completely failed. The problem is active as the car still remains at the dealership, Alan Jay Chevrolet of Wauchula. The vehicle has not been inspected by the manufacturer, but by the qualified service staff at the dealership.

Car with only 3900 miles brand new after 3 months the braking system, collision system, parking assist, ABS and brake lights appeared on dashboard, at the dealer since 07/14/2025, I was suggested not to drive the car. Same day called GM customer service and opened a case, the dealer gives me a rental car to use until the repair is finished. At the end of the same week I called again GM customer service asking about news and the parts was back ordered, they told me to wait 5 business days for a possible repurchase or for any updates for parts. Today 07/31/2025 I called again GM and they said that the parts were shipped but they didn’t had the tracking number, I called my dealer and the parts are in back order without eta.

Master Cylinder failure after less than 3 months of ownership and only 3,891 Miles. Multiple warnings lights related to brakes appeared when the car was started. GM already had a TSB for the 2024 Traverse but has not come out to say 2025 models are impacted yet. Multiple reports of people that do have the issue are waiting weeks for a replacement part because GM is not able to source them. Seems that there is a known issue but GM is just waiting for something to happen due to the lack of parts. Given it's the brakes could result is serious injury due to GMs negligence.

As I was driving my 2025 Traverse Z71, at 2180 miles, different lights popped up on the dashboard. I was backing out of my garage when it happened. Lights were ABS, BRAKE, Electronic Stability Control, and pre-collision warning light. Also notifications for Service Brake Assist and Service ESC also came on. The dealer had me drive it to their shop 25 miles away. After inspection, the Chevrolet service department said it was unsafe to drive my Traverse. The part they needed to replace was the Master Cylinder/Brake System Control Module. Unfortunately the part was on backorder and they did not have a loaner I could borrow. I turned in my vehicle Wednesday, June 25, 2025. I got my Traverse back Thursday, July 24, 2025. It was very close to 30 days and I would have followed guidelines for lemon law in state of WI. When I picked up the vehicle, there were several other Traverses waiting on the same part. As of now July, 30th, vehicle is in working order.

Began driving warning lights for brakes, abs, traction control, and forward collision on. Brakes then locked up. Pulled over and full lost brake compression. Could have caused an accident if on the highway. Waiting on tow truck to take to the dealership for repair.

The master brake cylinder failed around the 1600-mile mark. It seems to be occurring on 2025 Chevrolet Traverse and Buick Enclave models. GM has no ETA on replacement parts. I took it to a nearby dealer service center (Dave Kirk Chevrolet in Crossville, TN), and they diagnosed the issue. I took it to a second dealer (Murfreesboro Chevrolet Buick GMC in TN), and they diagnosed the same issue. The vehicle is now sitting in the dealer's lot with no ETA on a replacement part.

Purchased new 25 Traverse. Driving from AR to OK, stopped at a store, parked car. Upon returning to car, start ignition and red "BRAKE" light illuminated as well as ABS, Traction control and forward collision icons all lit. "Service brake assist, service esc, rear auto brake and park assist unavailable" warnings all show on the dash. Vehicle had 2747 miles at time this occurred. Systems check on dash showed all tires not registering on the vehicle and the vehicle icon illuminated orange. Vehicle needed to "relearn sensors." Vehicle has several clicking noises in the dash after shutting off. Vehicle brake pedal clicks when depressed at low speeds (as in driving in a parking lot) These noises and issues were not occurring prior to this vehicle stopping at the 2747 miles. Vehicle is unsafe to drive as this is the main stopping system, we were 300 plus miles from home when this happened.

On 6/18/25 vehicle started displaying "Service braking system" and "service electronic stability control" warnings along with warning chimes and various malfunction indicator lights. Malfunction Indicator Lights included service brakes, ABS, and ESC. Vehicle taken to dealer service department on 6/18. Service department has replaced the battery and brake assist module, but the problem persists. GM says to replace the brake master cylinder, but no parts are available. Dealer has impounded the car as a safety concern and has provided a loaner vehicle. Because this involves the service brakes it is a safety concern.

Had lights on my dashboard when I turned it on the morning of 6/1/25. Brake light, traction, ABS, and forward collision. Cruise control also stopped working. Brake module needs to be replaced.

While driving the vehicle a brake assist and service ESC fault occurred. It flashed on the dashboard. The issue just appeared with no prior warning. This made the brakes very difficult to engage and control. I was driving 50+ MPH down a congested road and almost collided with vehicles in front of me stopping for a traffic light. I had my wife and two small children in the vehicle with me. I made it to a place of business and turned the vehicle off. It would not restart and had no power. It was towed to the dealership. The issue has occurred on two other occasions. Once about a month prior. The vehicle was able to restart and the fault was gone. The first time this happened was right after I purchased the vehicle. It had 500 miles on it. It was serviced by the dealership who replaced the master brake cylinder. The vehicle does not feel safe to drive due to the issue. You loose control of the brakes with no prior warning.

Master cylinder failure per Chevy shop. Dash board ESC alert with immediate service needed. No obvious symptoms prior to warning dash alerts. part is delayed no ETA

On June 10th I drove my vehicle to work downtown Cleveland (no issues). Got home around 1 pm and had to leave at 3:30 to get my daughter from school. As I got in my vehicle I started to go in reverse and received all of those notifications and my brakes went completely out and I had to slam it to the floor to stop it was so scary and I thank god I wasn’t on the road or with my children!! I called the dealership the next day and they finally had my vehicle towed on the 12th of June. Once my car was there “the error messages disappeared and it was fine”. I did not feel safe taking the car back so they kept it another day and had the technician driving it around, still nothing until he washed the vehicle then it happened. After doing a ton of my own research others have stated the 2025 traverse has the same issue and they had to get the master cylinder replaced so I mentioned this to them at the dealership. The lady called me back and said I was right. They put me through Hertz for a rental and I found out today they didn’t even order the part until the 20th. This is very frightening and should be a recall immediately! I can’t imagine if I was driving 70 mph and this happened I could’ve died or killed someone else!

Car has 1200 miles on it. Turned on and dash lit up with warnings. Took to dealer who confirmed the master cylinder is bad & must be replaced. Worse than that—it is back ordered and I am currently given an estimate of July for the replacement part. Hadn’t even made the first payment on my brand new vehicle before it had to be taken in and now I am without it for an unforeseen amount of time.

I JUST bought my car brand new 3 weeks ago. Yesterday as I was driving, my whole brake system just went out. About 6 lights came on the dash and maintenance was flashing. I got it to the nearest Chevy dealer and the Master Cylinder is bad. On A BRAND NEW CAR. A cylinder should last the lifetime of a car…not 3 weeks. The car is not drivable and I am told the parts are back ordered until the end of July. What if my children were in the car when this happened or if I was going 60 mph?? Unacceptable and someone needs to be aware of this!

Purchased car Tuesday, Thursday night upon pressing the start button all power went out on car. Driving to dealership to have car looked at vehicle shutoff completely at traffic light. Vehicle restarted then two miles from dealership car had multiple warnings and brakes completely went out. Managed to get car off the road safely, currently awaiting tow.