general problems of the 2015 GMC Sierra 1500 - part 1

The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was firm and unresponsive, and the vehicle was difficult to stop. The vehicle eventually came to a stop with the abs warning light illuminated. The vehicle was driven back to the residence. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 132,235.

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

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.

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.

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.

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.

"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?.

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???.

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.

Brakes fail at low speeds.

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

Low speed truck brake pedal becomes stiff and truck is hard to stop.

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.

Constant “service trailer brakes” warning on dash. I haven’t done anything to cause it.

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

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.

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.

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

Brake pedal effort is increased, pedal gets hard and vehicle is hard to stop. Happens at slow speed. Intermittently.

Trailer brake system message keeps showing up on my dash and it’s not safely to drive.

I tried to buy a car at car dealershipin lafayette oregon ( pouya auto sales) GMC sierra 2015 black . On the date 02/09/2023 . They soldme this car with abs ,cruscontrol, presusre tires ligths on dashbord . The financial bank recomend me to bring the veicule back to the dealership to have them to fixed . . They didnt want to continue with the contract anymore and canseled . Now they want to sell the truck to some one else . And is not safe to drive it with this isuuses.

The contact owns a 2015 GMC Sierra 1500. The contact stated while driving 10 mph and coming to a stop, the brake pedal was depressed but hesitated to respond, causing 10-15 feet stopping distance delay. The contact stated that the failure reoccurred while driving downhill. The brake pedal was depressed down to the floorboard but failed to respond, almost causing the vehicle to crash into another vehicle. The contact pumped the brake pedal and the vehicle stopped; however, the failure reoccurred while driving at slow speeds and approaching the residence. The contact stated that her son test drove the vehicle at high speed and informed her that the brakes operated as needed. The contact became aware that the failure was occurring mainly while driving at slow speeds. The dealer was notified of the failure and informed the contact that she needed to pay a diagnostic test fee, but the contact declined. The vehicle was not diagnosed nor repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline. The failure mileage was approximately 61,299.

When braking at low speeds I have no brakes to stop and I can feel a vibration in the brake pedal.

Brake pedal is hard to push at low speeds.

At low speeds , like parking it lost all brakes. I have noticed a few times since the first. I see they had a recall for the brake vacumm pump but I cant find much on it.

Brake vacuum fail, causing the brake pedal to become stiff and unable to stop the vehicle. This issue has been on the recall for the same year and make of truck as mine, yet mine is not eligible for this recall repair? please help thank you.

The truck has something wrong with the trailer braking system. With no notice it display "service trailer braking system" in the dic. This will cause loss of brakes to the trailer and make it very difficult to stop with the trailer. Everything functions properly and at a random moment they will just stop working.

Trailer brake system warning.

Hard break peddle at low speeds, break booster issue.

Purchased GMC sierra c1500 new in 2015 from a dealership in orange county, CA. Experienced multiple issues over the past 4 years with the "trailer brake system" service light and loud beeping which has created multiple safety issues making the vehicle undrivable at times. The last incident was while on a cross country road trip through extreme heat in the southwest from texas to California in June and most recently while visiting orange county. The beeping noise almost caused a couple of accidents as the hands free phone system was inoperable due to the loud warning beeping noise as it went on and off about 50 times. We were required to take several risky maneuvers to pull the vehicle off heavy highway traffic at high speeds to stop the engine and restart in an attempt to reset the warning beeping system without success. The truck was checked in for service on 07. 20. 2022 at tustin Buick GMC. Mr. John boozer, service advisor. 714. 669. 3699. The total cost of repairs is $465 plus car rental of $80. Additional costs in April of 2019 for the repairs included fuse replacement, check of wiring harness and attempt to stop the beeping noise was $150. The defective wiring harness originally installed by GMC when the truck was built will be preserved and is available should your agency request it. Total costs out of pocket to replace or fix this factory defective part is $695. GMC has made no effort to address this issue or offer any recall notices related the failure of the "trailer brake warning system". Thank you for your attention to this matter.

On July 18, 2022 my trailer brakes suddenly stopped functioning ( a few hours from home) not only did did the trailer brakes stop functioning, but this warning message didn't popped up just one time, it kept coming again and again and again and again, relentlessy chiming and distracting me from driving. It covered my speedometer readout. It prevented me from receiving or making voice commands. The service warning chime also prevented the turn signal from functioning. So for a full 4 hours I was constantly reminded and was unable to receive calls or make voice commands. I absolutely wont hesitate to say the vehicle was not safe to drive in that condition. Your vehicle's defect endangered my life. I will not hesitate to say your vehicle was not safe to drive in that condition. Your vehicles defect endangered my life! lastly, my vehicle did not want to start the next morning!!.

My truck has just over 54,000 miles on it. I bought it new and have treated it well. It's my "Sunday" truck. Without warning, yesterday while carrying my wife to a doctor's appointment, as I pulled into a parking space to park . . . I had almost no brakes. I actually jumped on the emergency brake to aid me in getting stopped. After my wife had gone in for her appointment, I slowly moved the truck around the open areas of the parking lot trying to figure out what the problem was. I checked the brake fluid, looked to make sure I hadn't lost a brake pad or something else weird and found that everything was good. What I did find though was that the only time the truck had any issue was when I was moving under maybe 4 or 5 mph. And in fairness . . . I discovered the truck did have some tiny (but I do mean tiny) amount of braking ability at that low speed, but to say that the experience was unnerving would be a terrible understatement. Had someone been standing between me and the vehicle I was parking in front of when I experienced this, there is absolutely no doubt in my mind that I would have pinned them between our vehicles, or god forbid, something worse. I don't know what's going on here, but there's definitely something going on with the brake system at low speed on this GMC.

I keep getting a dashboard warning saying "service trailer brake system". From what I have found, this is due to an inexpensive wiring harness being used. It's very distracting and even if I dismiss the error, it keeps coming back up.

Was driving in a parking lot. When driving slow my brakes got stiff and I couldn’t stop it was so stiff it didn’t want to stop I had my kids and wife. Scary and unsafe. Told GMC there was a recall they said it was already fixed with my situation. But just cuz you see on the computer it doesn’t mean it’s fixed. So they said I got to pay but it’s in a recall already but properly not reboot right.

Na.