Table 1 shows one common service brakes related problems of the 2025 GMC Yukon.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
My brakes stopped working randomly. Alarms started going off in the car. Thankfully I was able to quickly turn right instead of rolling into traffic. This was terrifying and could have caused a very serious wreck.
The image module system has completely failed and never worked in the Yukon. Then it would brake while still accelerating.
I am writing as the owner of a new 2025 GMC Yukon xl at4 VIN: [xxx] , purchase date: 01aug2025, from elizabeth city GMC, elizabeth city, nc. This vehicle, equipped with the 3. 0l duramax diesel engine and super cruise hands-free driving assistance, was purchased for safe family travel, including space for my wife, our 21-year-old daughter, and our family dog(s). At approximately 4,300 miles—well within the 3-year/36,000-mile bumper-to-bumper warranty—this truck suffered a catastrophic right-rear brake failure directly attributable to a dealer-installed GMC-approved brembo performance brake upgrade package, resulting in a near-fatal highway incident and profound emotional hardship for my family. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
Keep quit working when I was driving , I just pick up from delearship for I another issue with on-star and is not part available is been there for over month not fix and now the brakes issue.
The contact owns a 2025 GMC Yukon. While the contact's husband was driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The contact stated that the brake failure warning light was illuminated. The contact’s husband depressed the brake pedal and noticed that the brake pedal was firm and difficult to depress. The contact stated that an error message indicated that the vehicle was decelerating. The contact's husband depressed the brake pedal and the vehicle decelerated to 40 mph. While the contact’s husband was slowly driving into the driveway at the residence, the brake pedal was depressed; however, the vehicle failed to stop. The contact’s husband immediately shifted the gear shifter into park(p) to stop the vehicle. The contact stated that the failure had occurred while on the way home from a family trip. The vehicle was towed to the dealer and the vehicle was diagnosed with a failed brake master cylinder assembly, a failed brake control module, and a failed brake plunger. The contact was informed that the brake master cylinder assembly, the brake control module, and the brake plunger needed to be replaced. The vehicle was not repaired. The contact was informed that the parts were on back-order. The manufacturer was not made aware of the failure. The failure mileage was approximately 3,150.
We purchased a brand new 2025 GMC Yukon on 5/19 and on 5/22, the vehicle would not release the parking brake. Multiple sensors / alerts were displayed, brake assist failure, press hard to brake, speed limited, service esc, service traction control, check engine light, brake park, service abs brakes. Vehicle was not drivable. Towed to marhofer GMC, problem was replicated next day. Was informed that brake booster and master cylinder were bad, however on a national back order. We are now 3 weeks out, without a repair completed or parts. Was also informed by dealer that there is a service bulletin out on this vehicle. Vehicle has 170 miles.
Roughly one to two times per day, a notification pops up on the infotainment screen stating that the brakes need to be serviced due to the brake assist system failing. The vehicle has been brought to 3 different dealerships and none of them know what the problem is, how to fix it, or whether it is safe to drive the vehicle still. The brakes seem to be working fine, however, it is concerning that even if the notification is safe to ignore, the brakes could indeed end up failing and the driver may not be aware due to receiving frequent brake failure notifications per day.