The contact owns a 2017 GMC Yukon. The contact received three different letters from the manufacturer. The letter sent in April of 2019 stated that they were extending the warranty coverage. The letter sent in September of 2019 mentioned NHTSA campaign number: 19V645000 (service brakes, hydraulic). The third letter sent in November of 2019 indicated that the issue was not a recall and they were extending the warranty again. The vehicle was taken to winegardner GMC Buick of prince frederick (935 solomons island rd N, prince frederick, md 20678, (443) 295-6182) where the ebcm module was reprogrammed only for the hydraulic system. The vacuum pump system was not repaired. The manufacturer was contacted, but had not responded back to the contact's inquiries. The contact had not experienced a failure.

- California, MD, USA

Was in school car line, went to move forward a little and brakes didnt work properly. Almost hit the car in front of me. Go straight to a dealership where they tell me about the recall. Schedule the fix, this morning when I left the dealership I discover the recall didnt fix my issue. Learn that I need a vaccuum pump replacement. I am upset that I am suppose to pay $500 for a faulty vaccuum pump and risk my life, the kids lives and people's live around me until I can afford this repair when it is faulty in the first place.

- Mountain View, AR, USA

The contact owns a 2017 GMC Yukon. While the contact's husband was parking the vehicle, the brake pedal had to be depressed to the floorboard to make a complete stop. Also, the service brake assist warning indicator illuminated. The vehicle was taken to blake fulenwider Dodge (located at 1310 E main St, eastland, tx 76448, (254) 488-429) where it was serviced per NHTSA campaign number: 19V645000 (service brakes, hydraulic) on October 18, 2019. After the contact left the dealer, and while depressing the brake pedal, the contact heard an abnormal noise coming from the brakes and the vehicle jerked forward. The manufacturer was not notified. The failure mileage was 50,700. The VIN was not available.

- Eastland, TX, USA

The contact owns a 2017 GMC Yukon. While driving 14 mph, the brake pedal was depressed, but the vehicle failed to stop and the brake assist and check engine warning indicators illuminated. As a result, the contact crashed into another vehicle. The air bags did not deploy. A police report was not filed and there were no injuries. The vehicle was taken to an independent mechanic who stated that a mode for the brakes was switched. The vehicle was repaired. The vehicle was not taken to a dealer for diagnostic testing or repairs. The manufacturer was not made aware of the failure. The failure mileage was 27,698.

- Bedford, TX, USA

When driving occasionally you have to push really hard on the brakes to stop. 9/10 times brakes work normal but once in a while you have to press very hard to stop. Was pulling into my driveway at a very low speed brakes were hard to press and ran into the wall of the garage. Brought to the dealer numerous times since I bought it brand new and still not fixed.

- Scottsdale, AZ, USA

Low speed break failure. In my driveway, in parkinglots, usually after having foot on break to "roll" and then stop again, no breaks, or have to put two feet down to stop. I hit a car in front of me two days ago after waiting at a red light, starting to roll because they rolled, then they stopped, and I hit the break and nothing happened. My husband has taken the car multiple times to be looked at for the breaks not working for at least 6 months.

- Elon, NC, USA

Have no brakes at low speed due to faulty vacuum pump

- Salyersville, KY, USA

My husband and I were driving on the highway at 70 mph when he needed to slow down and noticed the brakes on the Yukon were not functioning properly. More specifically, the brakes would not function the first 3-4 times when they were applied or tapped, but thereafter the brakes would become hard and he had to depress the brake pedal as hard as he could but with little to no stopping ability. The 'brake assist' light came on. Had we been in any traffic or on a shorter road, we would have surely crashed into someone and it could have been catastrophic considering we live in dallas where there is a lot of traffic. This day we were very lucky! GM had issued a service bulletin #pit5361B which affected multiple years and classes of vehicles to include the 2015 Yukon. GM acknowledged that 'a customer may comment on a hard brake pedal or that increased effort is needed to depress the brake pedal.' As evidence of the defect, GM notified its dealers, 'while performing normal diagnostics, fluid may be found in the brake booster and/or the booster vacuum line.' However, we called multiple dealerships within the dfw area and they all denied knowing any issue with GM brakes failing or the vacuum pump. Interestingly, there is a class action lawsuit on this very issue and GM also issued a series of service bulletins to its dealers regarding the brake defect, with the latest bulletin dated March 15, 2017, to include the 2015-2016 Yukon. Ours is just a 2017, 1 year outside of that. Who is to say this year isn't affected considering past history of the bulletins. It was thanksgiving holiday and no dealership could even get to it besides not knowing of any 'issue', even though it's all over the internet.

- Midlothian, TX, USA

While coming to traffic lights to make a stop the vehicle's brake pedal begins to get harder and harder to press while losing the ability to stop the vehicle. While entering parking spaces the brake pedal will get extremely hard and lose almost all stopping power. This happened a number of times in one day resulting in a near rear-ending of another vehicle as well as hitting a curb which stopped us from entering the front window of a retail establishment.

- Oceanport, NJ, USA