2015 GMC Yukon: brake failure

Filed Oct 4, 2022 · Brakes · SC

My brakes went out and a “service” message came up and said “brake assist”

Filed Oct 23, 2021 · Brakes · CA

I almost died today. My brakes failed pedal went hard still is. Had to drive home with a stiff pedal and almost no brakes. Just paid $50,000 for this truck

Filed Mar 2, 2021 · Brakes · 63,000 miles · CA

First note that our recall for increased pedal effort was done on our 2015 gmc yukon 2 months before this incident. Our vehicle was traveling at a high rate of speed coming home from mammoth on the 15 freeway. We heard what we describe as a 'buzzing' noise but we couldn't tell if it was our car or another on the freeway it almost sounded like tire tread before you have a blow out. We slowed down a bit (65-70mph) to check our surroundings. A few minutes later we started to lose control of our yukon. I started to unbuckle and climb to my husbands drivers seat because he wasn't responding to our screams and he looked ill. As I was screaming his name he finally says into my ear we have to crash! I panicked and screamed what is happening. He replies 'we have no brakes'! The pedal was as hard as a rock like a brick was underneath it and our car was serving back and forth. As traffic slowed and we prepared to crash into the car in front the center divider opened up and we were able to cruise down it until we slammed e brake on. These models should not be on the road and we could have very easily died or killed another family in the process! Absolutely unacceptable on gms part! Terrifying! There has been no vacuum pump recall placed on our yukon and it was the vacuum pump that failed which made the brakes fail there was no back up zero brakes with a family of 5 in the car on the freeway! Every owner who owns a 2015/2016 should be aware that this can happen to them. It's not just at slow speed. We haven't stepped foot in our car since our kids are scared to death to ride in any car that looks like it.

Filed Aug 1, 2019 · Brakes · 81,900 miles · TN

While sitting still at a drive through, brake pedal went to floor as if it had no pressure. Had no brakes! No matter how hard I stood on pedal the car would not come to complete stop when rolling. Blew through stop signs and lights because even at 10 MPH could not stop vehicle from rolling. Had just got off interstate doing 70 MPH. Down hill grade was impossible. Found out that this was a known issue by gm involving failure of vacuum pump booster. Many reports, hopefully not many deaths caused.

Filed Dec 31, 2018 · Brakes · 107,087 miles · LA

On two separate occasions when parking, and driving at a high rate of soeedv( 60 MPH)on interstate in sudden stop and go traffic brakes failed to engage after working properly before and again after with more than a month between incidents . The second incident occurred on 12/31/18 after the vehicle had been in for routine oil change and service that included a multi point inspection at the gmc dealership where it was purchased brand new. The vehicle is frequently serviced as required and has tires with good tread . The failure is alarming as it often comes when trying to make a necessary stop and the failure comes out of the blue then returns to normal. This occurrence should be addressed by the manufacturer and should be taken very seriously since the matter is literally a matter of life and death. I will be making an appointment for my vehicle to be checked out and will update the dealership findings .

Filed Dec 3, 2018 · Brakes · 100,000 miles · KY

On multiple occasions specifically while traveling at low speed rate such as slow moving traffic or pulling in or backing out of parking space. The brakes become hard to push and the brakes do not engage. You must push the brakes very hard to stop. We took to the gm service at our dealership and a brake vacuum pump was replaced. The next day we were driving the vehicle and the brakes failed to stop. Thankfully we were in a parking lot and were able to stop against bumper stop. We called the gm service dealership and they arranged for a tow. This is extremely dangerous situation.

Filed Nov 19, 2018 · Brakes · 47,200 miles · GA

Tl* the contact owns a 2015 gmc yukon. While driving at low speeds, the brakes failed to engage. The brake pedal became extremely stiff and the emergency brake had to be applied to stop the vehicle. The dealer was not contacted. The manufacturer was notified and referred the contact to the federal safety agency. The vehicle was not diagnosed or repaired. The failure mileage was 47,200.

Filed Oct 18, 2018 · Brakes · 57,000 miles · TX

Driving at a low speed through a drive through and my brakes failed when I tried to stop before pulling out onto a cross street. Pedal locked, and vehicle continued to roll. After stepping on the brakes a few times they engaged again. Same problem happened again when I was leaving a parking lot, only this time the brakes would not engage after several attempts. I coasted into a potted decorative tree that stopped me, shifted into neutral and back into drive and they began working again. No warning signals appeared on dash, and brakes and brake fluid have been checked and all are satisfactory.

Filed Dec 13, 2017 · Brakes · 42,000 miles · FL

Tl* the contact owns a 2015 gmc yukon. While at a drive thru with the brake pedal depressed to the floorboard, the brakes failed. The contact had to apply excessive force in order for the vehicle to stop. There were no warning indicators illuminated. The vehicle was taken to starling chevrolet buick gmc (1001 e irlo bronson memorial hwy, st cloud, fl 34769, phone: (407) 892-5144), but the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was notified and stated that the failure had to be duplicated. The approximate failure mileage was 42,000. The VIN was not available.

Filed Oct 28, 2016 · Brakes · 35,000 miles · TN

Tl* the contact owns a 2015 gmc yukon. While driving various speeds, the brake pedal was applied and the vehicle failed to stop. The brake pedal had to be pumped several times to stop the vehicle. The vehicle was taken to the dealer were it was diagnosed that the brake booster needed to be adjusted. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the dealer where the brake failure was duplicated and diagnosed that the brake boosters needed to be replaced. The manufacturer was notified of the failure. The failure mileage was 35,000.