Chevrolet Traverse collision warning problems

Filed Oct 19, 2026 · Brakes, Driver assistance · 19,357 miles · NC · 2 injuries

The contact owns a 2025 Chevrolet Traverse. The contact stated that while driving, approaching a traffic light, the Electronic Stability Control (ESC), rear collision warning, service assist, front collision warning, check engine light, and multiple brake warning lights illuminated. The emergency brake failed to function. The vehicle was towed to a local dealer, where the master cylinder failure was diagnosed, and the part was replaced. However, while driving after the repair, a complete brake failure occurred alongside the same warning lights. The contact lost control of the vehicle and traversed two intersections. The contact attempted multiple times to stop the vehicle, and the contact's daughter exited the moving vehicle before the contact stopped the engine by depressing the ignition button. The police were contacted, and a CAD report was generated. The vehicle was towed back to the dealer, where a second master cylinder failure was diagnosed and repaired under warranty. The failure mileage was approximately 19,357.

Filed Oct 1, 2026 · Brakes, Engine · 34,188 miles · MI · 2 injuries

The contact owns a 2025 Chevrolet Traverse. While the contact’s wife was driving approximately 5 MPH, the brakes independently activated while the accelerator pedal was depressed. The ABS, traction control, check engine, collision avoidance, and other unknown warning lights illuminated. An audible alert chimed erroneously without a pedestrian nearby. Due to the failure, the contact’s chest struck the steering wheel. A passenger seated in the front passenger’s side seat experienced mental distress. The vehicle was taken to a local dealer, where it was diagnosed, and DTC: P053D, C055F, P25A2, and 25NA240 were retrieved. The vehicle was repaired under warranty; however, the failure persisted. The vehicle was taken back to the same local dealer and scanned with an OBD2 scanner, and the failures were confirmed. The manufacturer was made aware of the failure. The failure mileage was approximately 34,188.

Filed Sep 17, 2026 · Acceleration, Driver assistance · KS

A software update caused the warning lights to go on and off despite no issues surrounding the vehicle (lane assist, forward collision warning). While driving on the interstate going 70MPH the forward collision light flashed a warning which then reduced the cars speed from 70MPH to 40MPH within a very short period of time. This is a huge safety concern and no accident happened as there were no other vehicles around at the time.

Filed Sep 11, 2026 · Driver assistance · 12,000 miles · NY · 1 injury

The contact owns a 2025 Chevrolet Traverse. The contact stated while driving 35 MPH, the Forward Collision Avoidance system activated, and the vehicle abruptly stopped. The Forward Collision Avoidance message was displayed. The contact stated that there were no vehicles nearby during the failure. The contact sustained back pain, right and left shoulders and neck pain due to the abrupt stop. The failure was persistent. The contact deactivated the Forward Collision Avoidance feature and then reactivated the feature. The contact stated that while restarting the vehicle the Forward Collision Avoidance feature was reset. The manufacturer was contacted by phone and a case was filed. The failure mileage was approximately 12,000.

Filed Jul 17, 2026 · Brakes, Driver assistance · KS

Vehicle: 2024 Chevrolet Traverse Z71 Mileage at first incident: 25,821 My 2024 Chevrolet Traverse Z71 experienced multiple safety‑critical electrical and ADAS failures. The vehicle had a Reduced Acceleration / limp‑mode event, accompanied by a strong antifreeze odor inside and outside the vehicle. Dealer diagnostics on 06/29/2026 and 07/16/2026 confirmed several trouble codes affecting the engine, braking system, and collision‑avoidance systems. The following diagnostic trouble codes were recorded: P3705 – Engine Coolant Pump Control Circuit Low (engine cooling fault) C0609 – Park Brake Actuator / Switch Signal Fault (brake system logic fault)-Active 6.29.26 10:12:43AM U160A – Lost Communication With Serial Data Gateway Module (CAN‑bus gateway failure)-Active 6.29.26 10:12:43AM U197A – Lost Communication With Front Radar Sensor Module (forward collision warning / AEB disabled)-Active 6.29.26 10:12:43AM These faults caused loss of radar‑based safety features, including Forward Collision Warning, Automatic Emergency Braking, and Adaptive Cruise Control. The vehicle displayed warnings and temporarily disabled ADAS functions. The Reduced Acceleration event created a hazardous situation in traffic. The dealer attributed the incident to “low coolant,” but the diagnostic codes clearly show electrical and communication failures across multiple safety‑critical modules. The antifreeze odor continues, suggesting a possible coolant leak or unresolved cooling system issue. The vehicle has been inspected by GM technicians, and the codes were documented on both visits but they say car is fine. The safety systems affected include brakes, engine cooling, electrical CAN‑bus communication, and collision‑avoidance radar modules. I am requesting the federal safety agency to record this complaint and evaluate whether these failures represent a broader safety defect in the 2024 Chevrolet Traverse Z71.

Filed May 12, 2026 · Acceleration, Driver assistance · CA

I am reporting a serious safety concern involving my 2026 Chevy Traverse that occurred on May 9, 2026 at 6:46pm. While driving at freeway speed in the carpool lane with adaptive cruise control and gap assist engaged, my vehicle suddenly applied the brakes unexpectedly even though there were no vehicles directly in front of me. The nearest visible vehicle was a significant distance ahead, and there was no apparent reason for the braking event. This was not a gradual deceleration. The vehicle actively braked. I was passing under or near an overpass at the time, which makes me wonder whether the sensors misread something. Regardless, the sudden braking created a dangerous situation because vehicles were behind me, and the driver behind appeared to think I was brake checking them. This could have easily caused a rear end collision. As a result of this incident, I no longer feel I can trust these safety/driver assistance systems and have since disabled those features because I do not feel safe relying on them until this issue is properly investigated and addressed. I am requesting that this issue be formally documented, that the vehicle be inspected for any malfunction related to adaptive cruise control, automatic emergency braking, forward collision warning, or related sensor systems, and that I be advised whether this is a known issue with the 2026 Traverse. If there are any software updates, technical service bulletins, recalls, or corrective actions available, please let me know. This is a serious safety concern, and I would appreciate guidance on the next steps.

Filed Dec 23, 2025 · NC

On Friday, 12/19/2025, I started by car and noticed that the infotainment display was taking longer than usual to boot up. It cycled through the Chevrolet splash screen 2 times until it ended on the "Update Failed. Returned to dealer." Due to this message on the infotainment display, there is no sound coming out of the speakers which results: *unable to hear turn signals when they are activated, *the front camera is no longer working, *unable to hear the parking assist when in reverse, *OnStar is no longer working, and *unable to hear front collision warnings. The display just cycles this message. I called around to several dealerships to see if I could get in that day to get this corrected. I was able to take it to a Chevrolet dealership on Tuesday, 12/23/2025, who diagnosed the problem as software corruption due to the over-the-air update and will result in a new radio needing to be installed. I then called Chevrolet Customer Service Center who stated that since my vehicle is outside of the bumper-to-bumper warranty, regardless of their over-the-air update causing the problem, I would have to pay for the repair. I asked, how do I know that this won't happen again with the new radio? They suggested that I have the dealership turn off the automatic over-the-air updates.

Filed Oct 31, 2025 · Brakes, Driver assistance · VA

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.

Filed Sep 23, 2025 · Brakes, Driver assistance · SC

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.

Filed Aug 13, 2025 · Brakes · CA

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.