2025 CHEVROLET TRAVERSE Complaints

Onstar Telematics module failure. Zero connectivity with onstar in the event of theft or crash. Also causing loss of navigation, wifi, and supercruise. Cannot connect to gm app for vehicle updates or to start engine, or lock/unlock doors. Dealer syates the part is on back order with no eta.

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.

- 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)

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

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.

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

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 antenna cover (shark fin) on the roof of the vehicle detached while driving and flew off. Looking at the piece that flew off, the clips that are made to clip in and keep it attached to the roof broke off somehow and seemed to be very weak where some were still attached. The safety of other vehicles are put at risk by it being unexpected flying debris and could potentially hit a vehicle/motorcycle following behind or debris is the roadway. My dealer specifically has not seen many, but when researching online, it’s is a very common issue with the 2024 and 2025 Chevrolet Traverse. My vehicle was brought to my dealership and a person from the body shop will attempt to attach it back for a temporary fix until the issue can be resolved and not have to pay hundreds of dollars for something that the vehicle owner had no control over breaking. There was no warning of this attachment breaking off, nor should it be something that a vehicle owner should have to worry about replacing six months in of purchasing a brand new vehicle.