Starting vehicle in parking lot and backing out of parking space. Brakes failed and truck continued to roll backwards almost hitting a pedestrian. I was able to stop hard on the pedal and stop the vehicle. This has happened several times. I have a steep driveway and backing down to the street the brake pedal will unexpectedly have little resistance and the truck will continue to roll into the street almost hitting oncoming traffic.

- Manhattan , KS, USA

Brake pedal pivot nut came loose and fell off while driving.

- Sierra Vista, AZ, USA

I was driving pulling an empty small U-Haul trailer and attempted to pull in to a fuel station when my brake became impossible to depress. I barely was able to miss hitting gas pumps and ran down into a ditch before the truck stopped. I informed the dealership where I had just purchased this truck used. I took it to their service department and I was told there was no issues with the brakes. They had to have this recall bulletin in their computer system yet failed to make me aware or to perform this recall or report it to GM. The problem continues to worsen to the point I am scared to drive it. I almost rear ended another car at a stoplight yesterday because I was unable to depress the brake pedal. I stood on the brake and heard an electronic sound but finally came to a stop.

- Oklahoma City, OK, USA

I've had problems with the brakes for several years, the pedal is very hard at low speed. I've seen a recall but not on my car"?"

- Gatineau, ME, USA

"NHTSA campaign: 19V645000 AS the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash." Our vehicle was serviced and repaired for this problem under the recall on 9/6/2019, however, it is now happening again. Is there a second recall for this problem, and/or what can be done to remedy the defective equipment?

- West Branch, MI, USA

upon applying brake pedal at low speeds the brake is hard to depress and "choppy" in reacting. this seems same as N192268490 Increased Brake Pedal Effort yet the gmc denali is not apparently in the recall. This has happened on several occassions.

- Exeter, NH, USA

The brake system failed in a parking lot three times within a month. It-??s related to the special policy and recall regarding the vacuum and the loss of brakes at slower speeds and in reverse. The first two accidents were very minor creating no damage. The third one was at 10mph when I lost my brakes and crashed into a concrete barrier in a parking structure causing significant damage to my truck. I did not get injured but I have a wife and two kids that I am so grateful were not in the truck for the third one with major damage. With that being said my son was in the truck the second time it happened when I crashed into a parked vehicle in a parking lot because I was unable to stop which made me very frustrated and worried for my families safety in my truck. The first accident was in a parking lot where I was backing up and lost the brakes and crashed into a building which is my veterinary office causing damage to the building. Therefore after the first crash due to this issue I have decided that driving with my family in the truck is not an option anymore. It is very disappointing that a truck I purchased for the functionality and safety of having my wife and kids in it is no longer safe for passengers or myself in it. This problem is very reproducible and is a major concern for my family and my safety. It was towed to a GMC dealership in Waukesha and is being inspected and they have stated it is reproducible. No warning lamps or messages were indicated for this issue. The truck will next need to get towed to Crash Champions auto body repair to ultimately get repaired which will take another month. All of this is a major inconvenience as I am a full time firefighter and in paramedic school as well. Not having a reliable safe vehicle for an extended period of time has caused great stress and inconvenience to my family. I-??m hoping and praying that something can be done about this quickly and promptly to make this right. Thank you.

- Waukesha , WI, USA

Brakes fail at low speeds

- Los Angeles, CA, USA

Intermittently with slow driving such as parking maneuvers or creeping slow traffic at stop lights the brake pedal becomes very soft and depresses much more than normal and the brake action is decreased. Sometimes with this soft pedal it sounds like ABS is engaging. Pumping pedal sometimes restores brake performance.

- Bridgeport, WV, USA

It keep having this issue constantly every minute saying trailer brake system

- Kansas City , MO, USA

low speed truck brake pedal becomes stiff and truck is hard to stop

- League City, TX, USA

Rainy road, 60mph on the hw with my family. Truck decides to engage stabilitrak or something to that feel and locked up the brakes. Talk about a scary moment with an 18 wheeler coming in hot behind you. Obviously, in the moment, I had no clue what was happening other than something with the truck was malfunctioning. This scenario could have gone wrong in so many ways. I'm honestly in shock someone has not been killed because of this?

- Alpharetta, GA, USA

The brake vacuum pump is failing. When in a parking lot the brakes get very hard al.ist causing an accident. There is no vacuum when trying to park in parking lot. The 2015 GMC Sierra had a recall for this but my VIN did not. Not sure why as it's failing too. I need my truck so will have it fixed today, but want a recall.

- Pine Island, MN, USA

Constant -??service trailer brakes-?? warning on dash. I Haven-??t done anything to cause it.

- Whiting, VT, USA

The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was firm while being depressed. The contact stated that the failure occurred intermittently while parking or while at a stop. The brake pedal failed to operate as needed. The check engine warning light was illuminated. The engine power reduced message was displayed. The vehicle was taken to an independent mechanic, where it was diagnosed that the brake booster pump needed to be replaced. The vehicle was not repaired. The vehicle was taken to the local dealer however, the technician was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 66,476.

- Virginia Beach, VA, USA

Body paint delaminating. Also, difficulty sometimes stopping vehicle extra length required to stop

- Williamsville , NY, USA

Problem # 1At low speeds /parking I loose power that affects steering the radio and windows. I get a message on board stability warning message. Steering become hard and can-??t control/turn the vehicle Problem #2 at low speeds /parking my brakes loose power I have to press brake really hard to stop truck.

- Little Elm, TX, USA

In several occasions my brake when approaching stop sign or light and I hit my brakes more than once it goes to the floor and it become difficult to stop without having to push very hard on the brake pedal. It does it almost every time.

- San Antonio, TX, USA

The contact owns a 2015 GMC Sierra 1500. The contact stated while driving 70 MPH and depressing the brake pedal, the vehicle would not slow down. The contact aggressively depressed on the brake pedal and the vehicle was able to stop as needed. The vehicle was taken to an independent mechanic to be diagnosed. The independent mechanic determined that the vehicle had experienced an unknown failure however, the vehicle was not repaired. The dealer was not contacted. The manufacturer was not notified of the failure. The failure mileage was 50,000.

- Mashpee, MA, USA

Service trailer braking system notice continues to pop up on the dash while driving.

- Springdale, AR, USA