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.
2015 GMC Sierra 1500: soft or spongy brake pedal
19 of the 721 complaints about the 2015 GMC Sierra 1500 describe soft or spongy brake pedal.
- owner complaints
- 19
- of this car's complaints
- 3%
- typical mileage
- 47,200
- recalls
- 1
Is there a fix? There is 1 recall and 36 service bulletins for this area of the car. See below
Soft or spongy brake pedal by model year
What owners say
Brake pedal is hard to push at low speeds
The component that malfunctioned is the vehicle braking system at slow speeds. I first experienced the problem at a restaurant drive thru line. After several stops as the line advanced, the braking system failed (extremely hard pedal) and car kept advancing and if someone would have been directly in front of me ( at a normal distance for a drive thru ) I would have made contact with them at a slow speed. I checked with my dealer the next day and they said that there were no reported problems for this issue on my vehicle. No warning lamps or messages present but it seems to me to be similar to the recall ( N192268490 ) as it only happens at slow speed with repeated application of the brake. There were no symptoms of the problem prior to this incident and it took me completely by surprise. I took the vehicle in to a service facility and they test drove it and said that they did not recreate the failure but I believe that they didn't try repeated braking at slow speed as I requested. I feel that there is a problem and that it only shows up during the aforementioned driving conditions. I have checked your website and the manufacturers and my truck VIN doesn't show up for their computer reprogramming recall but think that maybe it should.
Brake pedal stiff/hard when applying breaks. Problem occurs periodically within the city and highway.
When you step on the brakes in motion the brake pedal is hard and vehicle takes longer to stop.
Hard pedal, extremely poor braking response while slowing and during parking of vehicle, especially when multiple pedal pumps are required. Progressively worsening over past 6 months. I replaced vacuum boost pump and problem was corrected.
Brakes failed to reser at low speeds, resulting in near collision. Brake pedal became stiff and unresponsive. Has also happened previously, was told brake vacuum pump failure is the cause. Was notified this does not qualify under vehicle warranty despite reading of multiple reports of failure, technical bulletin release, and immediate safety issues.
Brake assist warning light came on with hard brake pedal at low speed braking. Does not happen ofter. Brought to dealer and had tested with no trouble found. Dealer said no recalls or service bulletins on issue.
Brakes fade at low speeds, vehicle continues to travel while the brakes are applied. Hard brake pedal pressure must be applied to stop.
Several times at low speed maneuvering the brake pedal became hard, required increased effort to depress, and braking distances were increased. Occurs randomly and without warning. No accidents yet, but several close calls. Vehicle has only 44,000 miles.
I pulled into a parking spot and lost the ability to stop my truck. The brakes locked up and I couldn't push down on the brake pedal hard enough to get the truck to stop. I was going slow enough to use the curb in the spot for it to stop me from hitting anything. I had my car towed to a repair shop and they confirmed that the brake vacuum pump failed and had to be replaced along with the master cylinder and because the vacuum pump was the initial point of failure, the repair was not covered under my warranty.*dt vehicle repaired
On november 17th 2018 my brakes went out on a 2015 gmc 1500 at 35 MPH stopping at a red light which just turned green .I switched lanes and almost crashed. I had my grandchildren in the vehicle along with my wife. The vehicle need to be towed to a gmc dealer. The diagnoses was the vacuum pump total failure the brake pedal was hard with no stopping power. My gmc had 34000 miles on it . Now I have a tow bill and repair cost for a part gm will not recall. This was reported to gm and they opened a case and closed it. The said they would give a hundred dollar coupon. This is ridiculous some one is going to get killed because of this faulty part. I thought they would be will to help and make things right . Gm case 8-4845403712 thanks this corporation needs to be responsible.
Service bulletins that may apply
Related recalls
Service brakes, hydraulic: power assist: vacuum
- What is wrong
- General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
- Risk
- 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.
- Remedy
- GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1‑800‑630‑2438, Cadillac customer service at 1‑800‑458‑8006 or GMC customer service at 1‑800‑462‑8782. GM's number for this recall is N192268490.
Recall number 19V645000 · Recall details
Questions about the 2015 GMC Sierra 1500 spongy pedal
Is soft or spongy brake pedal a common problem on the 2015 GMC Sierra 1500?
19 of 721 owner complaints about the 2015 GMC Sierra 1500 (3%) mention soft or spongy brake pedal. The model year with the most reports is 2015.
Is there a recall or service bulletin for this on the 2015 GMC Sierra 1500?
There is 1 recall and 36 service bulletins for the same area of the car. Check them below with your VIN.
Other symptoms on the 2015 GMC Sierra 1500
Headlights 89Brake failure 35Loss of power 32Check engine light 21Power steering loss 21Stalling 18Transmission failure 18Harsh shifting 17Shudder 15Engine failure 14Jerking 14Fire or smoke 13Hesitation 12ABS 11Knocking 11Slipping 11Misfire 7No deployment 6Steering lock-up 6
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