10.0

really awful
Crashes / Fires:
13 / 2
Injuries / Deaths:
2 / 0
Average Mileage:
44,979 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2015 GMC Sierra 1500 brakes problems

brakes problem

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2015 GMC Sierra 1500 Owner Comments (Page 1 of 11)

problem #207

Apr 012024

Sierra 1500

  • miles

A D V E R T I S E M E N T S

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

- Kansas City , MO, USA

problem #206

Feb 222024

Sierra 1500

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

- League City, TX, USA

problem #205

Dec 092023

Sierra 1500

  • miles
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

problem #204

Sep 272023

Sierra 1500

  • miles

A D V E R T I S E M E N T S

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

problem #203

Aug 212023

Sierra 1500

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

- Whiting, VT, USA

problem #202

Jul 192023

Sierra 1500

  • 66,476 miles
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

problem #201

Jul 232023

Sierra 1500

  • miles

A D V E R T I S E M E N T S

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

- Williamsville , NY, USA

problem #200

Jun 082023

Sierra 1500

  • miles
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

problem #199

Jun 182023

Sierra 1500

  • miles
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

problem #198

Aug 012018

Sierra 1500

  • 50,000 miles
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

problem #197

Apr 032023

Sierra 1500

  • miles

A D V E R T I S E M E N T S

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

- Springdale, AR, USA

problem #196

Mar 182023

Sierra 1500

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

- Visalia, CA, USA

problem #195

Mar 042023

Sierra 1500

  • miles
Trailer brake system message keeps showing up on my dash and it-??s not safely to drive

- Beatrice , NE, USA

problem #194

Feb 092023

Sierra 1500

  • miles
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

- Vancouver , WA, USA

problem #193

Aug 012022

Sierra 1500

  • miles
Hard break peddle at low speeds, break booster issue

- Greenville, SC, USA

problem #192

Jul 012021

Sierra 1500

  • miles
Trailer Brake System Service.

- San Jose, CA, USA

problem #191

Sep 242022

Sierra 1500

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

- Church Hill, TN, USA

problem #190

Sep 172022

Sierra 1500

  • miles
Brake pedal is hard to push at low speeds

- Pasadena, MD, USA

problem #189

Sep 152022

Sierra 1500

  • miles
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

- Weston, MO, USA

problem #188

Aug 282022

Sierra 1500

  • miles
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

- East Peoria , IL, USA

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