2015 GMC Yukon XL brakes problems

Related recalls

No recalls on file.

What owners say

1. Filed Mar 23, 2026143,000 miILBrakesEngine

   The contact owns a 2015 GMC Yukon XL. The contact stated that while driving 70 MPH and exiting the highway, the brake pedal was depressed but the brake pedal was stiff and stuck, requiring that the transmission be shifted to neutral(N), and to stand on the brake pedal with both feet. The contact continuously pumped the brake pedal, but the vehicle slowly responded and almost crashed into other vehicles. There was no warning light illuminated. The contact's wife and daughter…

   NHTSA complaint #11726283 · source
2. Filed Jun 9, 2025AZBrakes

   Service Box appears indicating - "Trailer Brake System" with a loud BING, BING, BING Alert sound. It continues every few minutes... Please note: we aren't using a trailer... I have googled/youtube it and found that this is an issue with many owners. They indicate that the wire harness in between two of the body control modules is defective. It is known to have faulty wire connection. This is intermittent, goes for months and stops for months, and then starts up again.…

   NHTSA complaint #11665834 · source
3. Filed May 28, 2025MIBrakesOther / Unknown

   I purchased a 2015 GMC Yukon in March 2024 I drive the vehicle 9 mons, 7500 miles the vehicle has been in service at my local dealership since Dec 13, 2024, for engine and transmission replacement, I have had the vehicle back 3 weeks not the warning light and service warning chime for the "Service Trailer Brake System is on, I have not ever use a trailer with the vehicle, I was told the vehicle needs a wire harness, I have read this a problem in these vehicles that has not…

   NHTSA complaint #11663384 · source
4. Filed Dec 4, 2024NYBrakes

   This is a complaint for my vehicle Gmc2015 Yukon. My Truck brake system(vacuum pump is defective). my large truck is a safety hazard on highway and street . when i attempted to park while depressing my brake pedal it instantly before very hard to press to stop my truck. i have to apply lot of force to my foot inorder to stop vehicle. my mechanic inspected vehicle and it show a bad (defective vacuum pump) . base on former complaints about this same problem (2019 NHSTA…

   NHTSA complaint #11628866 · source
5. Filed Nov 27, 2024NJBrakes

   There has always been break problems with this vehicle. Some recalls have been done. Now there is a new problem, I took it to the dealership. There is a special coverage to fix this issue. GM denied to fix it because the special coverage expired on 06/06/2024. But the vehicle is under the miles and the problem just started.

   NHTSA complaint #11627708 · source
6. Filed Nov 25, 2024NYBrakes

   My power vacuum brakes system is not properly working. In order to stop truck I must depress brake pedal very hard just to stop truck. Crunching noise every time. Made several trip to mechanic . I changed many part ( brakes) rotors , still and brake vacuum sensor ( purchase from gmc dealer . Still have this problem. Mechanic states, need new vacuum pump. Very dangerous to drive. Very difficult to stop . Please investigate this VIN for common complaints.

   NHTSA complaint #11627260 · source
7. Filed Oct 4, 2024NCBrakesDriver Assistance & Safety TechElectrical System

   Defective wire harness between 2 body control modules, causing alarm to go off repeatedly "Service Trailer Brake System" and also "Stabilitrack" will come on randomly and lock my brakes up and all of the features in my dash. This has been very scary to drive and has brought the vehicle close to collision more than a handful of times now.

   NHTSA complaint #11618127 · source
8. Filed Sep 30, 2024TNBrakesElectrical SystemEngine

   I keep getting a warning on my display on dash about my trailer brake system is not working. Also my temperature gauge stops working and I have to take off negative cable on battery to reset it. Temperature control sensor has been replaced but the problem still continues to happen.

   NHTSA complaint #11617294 · source
9. Filed Apr 7, 2024TXBrakes

   On several occasions, have noticed the brakes failed to operate properly when vehicle is at low speed. The pedal becomes extremely hard to push and there is almost no braking power. This has occurred in stop and go traffic and nearly caused an accident.

   NHTSA complaint #11581577 · source
10. Filed Dec 7, 2022TXBrakes

    This vehicle was purchased on 7/05/2019 with miles 52,000 and the TRAILER BREAKE SYSTEM has gone bad 2 times already and I haven’t never used the trailer hook for anything is just so expensive to fixed it and goes bad again and all part we’re purchased from the dealership even the dealer said is a manufacturer error and this will keep happening because is manufacturer error was not designed correctly as a consumer I feel that I shouldn’t be paying for their mistake GMC…

    NHTSA complaint #11496505 · source
11. Filed Nov 30, 2022PABrakesElectrical System

    My vehicle Has a Service Trailer Brake System notification in my dash that dings as well. It does it on cold mornings with no trailer attached. I don’t trailer often.

    NHTSA complaint #11495487 · source
12. Filed Sep 28, 2022MOBrakesElectrical SystemOther / Unknown

    Trailer assist error. Brakes not working. Ac compressors been replaced and the fan runs after the vehicles off and ac only blows warm air

    NHTSA complaint #11486969 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology