2015 GMC Sierra 1500 Service Brakes Problems
- 140
- Owner complaint records in our dataset
Records are owner complaints, not a measured failure rate.
Owner complaint recordsComplaint records reflect reports in our dataset and do not measure how frequently the problem occurs across all vehicles.
Among these 140 stored complaint records:
- 11 indicate a crash
- 0 indicate injury
- 1 indicate fire
What owners report
- brake pedal · 80 records
- vacuum pump · 42 records
- brake booster · 11 records
- brake vacuum · 10 records
- pedal became · 8 records
- pedal becomes · 8 records
Mileage in stored records
| Band | Records |
|---|---|
| 30–60k mi | 69 |
| 60–100k mi | 40 |
| 1–30k mi | 15 |
| 100–150k mi | 8 |
Complaint records
Owner-submitted complaint content, presented as stored.
Service Brakes
Brakes fade at low speeds, vehicle continues to travel while the brakes are applied. Hard brake pedal pressure must be applied to stop.
ODI 11171487
Electronic Stability Control · Service Brakes
Brake pedal or that increased effort is needed to depress the brake pedal. Also, in some cases a tick or ticking noise may be heard, which may sound like an exhaust manifold leak.
Crash reported
ODI 11171074
Service Brakes
At low speeds break pedal will not depress and i have a hard time stopping the truck. I almost hit a car yesterday and after doing some research found that the vacuum pump failure is a known problem. This is extremely scary and dangerous. Someone could easily hit a pedestrian. My truck has less than 50,000 miles, which seems to be the average for this problem.
ODI 11170697
Power Train · Service Brakes
Brake pedal goes soft and can hit the floor on occasion. Mostly happens with in reverse. 40k miles. Also transmission shifts are erratic. Rpm can shoot up between shifts.
ODI 11170571
Service Brakes
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.
ODI 11170527
Service Brakes
I was on a major highway traveling when the traffice became stop and go. As i was traveling in heavy traffic for about 5 minutes, my brake became stiff and would not allow me to stop as normal. I was able to stop just short of rear-ending the vehicle in front of me, however it was merely by inches. Considerations : i was on a slight decline and my vehicle has start assist where the brake pedal remains stiff when in…
ODI 11171053
Service Brakes
At slow speeds the brake assist does not work. Requires much more effort to stop vehicle. Seems related to faulty vacuum pump as mentioned by ohters on internet forums.
ODI 11170091
Service Brakes
When applying brakes after first push the pedal gets hard and doesn't stop hardly. Does it either going forward or reverse. Has happened numerous times since truck was bought new.
ODI 11166663
Service Brakes
BREAK PEDAL AT LOW SPEEDS LOCKS UP COMPLETELY.
ODI 11197381
Service Brakes
When the truck's vacuum pump fails, the brake pedal becomes very hard to push. The truck does not stop at low speed when this happens. The first time this happened, i was backing into a parking space at christmas tree stand. I nearly backed into the tent and persons loading the christmas tree in the truck. The second time this happened, i was parking my truck in driveway. I rolled about 6' to 8' before stopping. I…
ODI 11229020
Service Brakes
Tl* the contact owns a 2015 gmc sierra 1500. While driving 1-10 mph, the brake pedal was difficult to depress and failed to stop the vehicle. There were no warning indicators illuminated. The local dealer and manufacturer were not contacted. The vehicle was not diagnosed or repaired. The failure mileage was 80,000.
ODI 11193048
Service Brakes
I was driving down a hill at about 15 miles an hour and when i went to press the brake pedal i heard a noise and the brake pedal went to the floor and truck would not stop. I had to swerve off the road to avoid a collision. After, the brake pressure returned while driving, but when stopped it would lose pedal feel and go back to the floor. After reading articles it was obvious the vacuum pump was failing. I limped…
ODI 11164578
Service Brakes
There is a known brake problem caused by faulty vacuum pump. With the vacuum pump failing there will be loss of assisted braking. Some people have noted requiring 2 feet to stomp on the brakes to stop the truck. The dangerous braking problem seems to happen during low speeds. Some members on the forums have mentioned getting into accidents. Gmc does not cover the vacuum pump under their warranty which is ridiculous.…
ODI 11164418
Service Brakes
Brake pump went out almost ran into a pole. Reading online and see a lot of people having the same problem. Angry!!
ODI 11163216
Service Brakes
It started happening a week or so ago where when in reverse or after switching from reverse to drive and trying to brake the pedal wouldn't compress, it was as if they were locking up on me. I would have to put most of my body weight on the pedal to even get the truck to stop, to the point where i almost ran into my neighbors car backing out of the driveway. It seemed to mainly happen at slower speeds, in both drive…
ODI 11163659
Service Brakes
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.
ODI 11176527
Service Brakes
When backing up, after repeatedly pressing the brake pedal, the brake pedal went to the floor and would not stop the truck. The truck rolled uncontrollably down the driveway and luckily did not hit anyone or anything. It could have killed someone though. The same issue occurred in a parking lot when backing up in an open space. After repeated hitting the brake pedal to line up the vehicle, the brakes stopped working…
ODI 11161207
Service Brakes
While driving at slow speeds, the brake pedal became very hard to push. This caused the truck to be difficult to stop, which caused me to almost rear-end the vehicle in front of me. This has happened several times. In response to this, the gmc dealer replaced the vacuum pump.
ODI 11161935
Service Brakes
Tl* the contact owns a 2015 gmc sierra 1500. While driving 25 mph, the contact heard a grinding noise emerging from the front driver side of the vehicle. The vehicle was taken to hennessy buick gmc ([redacted], morrow, ga 30260) where it was diagnosed that the brake vacuum pump needed replacement. The manufacturer was notified of the failure and provided case number: 8-4881978797. The vehicle was repaired. The…
ODI 11156642
Service Brakes
Vehicle's brakes become stiff at low rpm causing difficulties stopping.
ODI 11192191
Service Brakes
When driving forward or backwards at low speed brake pedal seems like it locks up and it is extremely hard to stop the vehicle i had to press the parking brake a couple times just to get it to stop
ODI 11155650
Service Brakes · Vacuum
Tl* the contact owns a 2015 gmc sierra 1500. While driving 15-25 mph, the brake pedal was depressed, but was difficult to slow down or stop the vehicle efficiently. The contact stated that the brake pedal was very stiff. The vehicle was taken to kunes country chevrolet buick gmc of elkhorn (located at 1350 wi-67, elkhorn, wi 53121, [redacted]) where it was diagnosed that the vacuum pump was weak. The vehicle was…
ODI 11160987
Service Brakes
On several occasions the brake pedal becomes difficult to depress. Releasing the pedal and depressing again corrects the problem. Today while exiting a parking space at low speed to avoid collidiong with ann approaching vehicle it took both feet to depress pedal. I am a 200 lb. Male. I am not sure a small female could have corrected the failure in a timely manner.
ODI 11153955
Service Brakes
At slow speeds from a stop if you let off the break pedal and immediatly reapply there seems to be extremely hard breaking. Almost impossible to stop the car.
ODI 11153964
Service Brakes
I first noticed the problem when i was backing down the ramp to launch my boat. Generally i can lightly touch the brakes and the truck will stop immediately. But this time it did not and i had to pump my brakes multiple times before it finally came to a stop. I was quit alarmed but kinda blew it off. The truck had traveled about six feet further than i had anticipated. About a week later i stopped to go through my…
ODI 11156480
Catalog parts for this system
Catalog year/make/model rows for 2015 GMC Sierra 1500.
Catalog fitment does not by itself prove OEM-equivalent compatibility.