2015 GMC YUKON XL Complaints

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.

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.

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.

Leaking fuel from the top of the tank when I start vehicle and after 5-10 minutes it stops this the second time this have happened

The radiator was replaced under PI1513F in 2020. I am currently experiencing the same coolant leak and thermostat issues. Coolant leaked into 4th cylinder and blew head gasket

Pinhole fuel leak located in the bend radius of a plastic, quick disconnect coupling, of a pressurized fuel line, just forward of the fuel tank. Being a pressurized line, the leak is continuous, whether the vehicle is on, or off. Due to the location of the leak, fuel is sprayed upwards onto other shielded lines and components, representing a safety/fire hazard.

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.

The contact owns a 2015 GMC Yukon XL. The contact stated while driving at an undisclosed speed, the front passenger's side headlight failed to illuminate. The vehicle was taken to the dealer, where the passenger's side taillight was replaced; however, the failure recurred. The vehicle was taken back to the dealer, and the contact was informed that the front passenger's side headlight needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 83,415.

My engine went out, and I had to have it rebuilt. There was a check engine light on. My steering goes out and in without warning while driving. I have talked to the dealership, and they stated that all safety recalls were done on my vehicle. My safety and those of others were put at risk when the steering failed. I almost crashed my vehicle in traffic. There were no warning messages prior to the failure. I did see that there was a recall in 2019 and the dealership will not inspect the vehicle without payment.

While driving our GMC Yukon XL, the vehicle will begin shuttering, losing power, slip gears, or unable to shift gears. On one occasion, the vehicle lost was unable to accelerate and maintain speed causing my wife to quickly respond by changing lanes and pulling off on the shoulder of a road, in a very dangerous situation, all while coasting without engine power. Two independent mechanic shops have reported that the torque converted failed and had sent metal fragments throughout the transmission, and ruining the transmission. Both mechanics recommended a new transmission.