When 'feathering' my brakes whenever I'm in a small area (parking lot, fitting into a space, my brakes grind while pushed all the way to the floor and the truck continues to roll another foot or so when coming to a stop. This has also happened when at a stop sign/red light if I disengage the brake to move forward a bit and then try to stop. This happens with the truck in drive or reverse. It's happened in both parking lots, my driveway, and off ramps from a highway.

- Kaukauna, WI, USA

I was driving South on the 101, in calabasas ca. As I tried to brake the pedal got very hard. Every time I braked it was taking longer to come to a complete stop. I'm traveling to Mexico with my family. I will take my vehicle to the dealer in simi valley, ca. I consider that this is a very dangerous situation of all the owners of this vehicle. When this happens it makes it extremely dangerous for all occupants and other drivers who are next to them. I hope you take in consideration my concern.

- Santa Maria, CA, USA

While backing with trailer down long downhill grade, brakes fade and get hard to push, reducing stopping power to the point that it's not certain I will be able to stop.

- Staunton, VA, USA

On several occasions when braking at low speeds pedal feel becomes hard and vehicle will not stop. There have been multiple instances where this issue has almost ended in a collision

- San Marcos, CA, USA

My Silverado has around 56K miles. Two days ago the issue with the brake pedal falling to the floor started. This is at low speeds and especially after using the brakes a few times. This is not the ABS kicking in. I was a service manager for Ford for years and it feels like when a brake booster goes bad. Vehicle was dropped off at fx caprara Chevrolet in pulaski NY this morning for diagnosis as the vehicle is not safe to drive like this. Vehicle was almost in an accident twice.

- Oswego, NY, USA

After driving extensively through several towns, cities and on highways, the brakes went out as we turned into our driveway. Harold Chevrolet (dealer and service) replaced master cylinder, brake booster, vacuum pump and hose because the vacuum pump leaked internally into brake booster. ($1638.86) this is very concerning because according to the newspaper, you are aware but have failed to warn owners. Injury and loss of life is a real possibility. I use this truck to back my boat into the lake several times a week. If the brakes had failed, I do not think I could have survived with my age (73) and disability (neuropathy of feet and legs.)this really stresses me.

- Lagrange, IN, USA

Under low speeds the vehicle brake pedal gets very hard and the vehicle does not have expected or typical stopping power. The problem is exacerbated when towing and on hills. A service bulletin has been posted by GM (pit5361B) detailing the problem is caused by poor vacuum supplied to the brake booster at low engine speeds. First noticed the problem on an incline while towing a boat, the truck could not stop the setup within a few feet even at well less than 5 mph. Continues when backing down the boat ramp and even stopping in stop and go traffic.

- Dayton, OH, USA

When vehicle is in motion on any street surface and I apply the breakes, the brake pedal gets hard, causing increased braking effort and longer stopping distances. Local dealership determined it was the brake vacuum pump.

- Canon City, CO, USA

When traffic is stop and go I lose the power breaks and have to puse extra hard to stop truck

- Allen Park, MI, USA

Applying the brakes requires excessive force to bring the vehicle to a stop. Chevrolet dealership diagnosed a damaged/faulty vacuum pump as the cause of the issue. This nearly caused an accident with another driver when attempting to stop on a city street in williamsburg, va at a red light.

- Williamsburg, VA, USA

The vehicle was moving slowly in traffic ramapo valley road (aka rt 202) in oakland NJ when I applied the brakes. The brake pedal would not move and the vehicle would not stop, I tried twice before stepping on the emergency brake. At the same time I stepped on the emergency brake I hit the car in front of me causing no damage to the vehicle but my vehicle has a dent in the front bumper from the tow hitch on the car I hit. There were no injuries reported at the scene. The police officer arrived and moved my truck confirming there was a brake failure. The police officer moved my truck to a driveway across the road and a message regarding a brake assist failure displayed on the dash. No indication was displayed at the time of the accident. The police officer declared the vehicle unsafe to drive and had it towed and impounded. After getting a vehicle release my truck was towed to the dealership in little falls NJ where the service supervisor confirmed the brake vacuum pump failed. I was contacted by GM and gave them information regarding the accident. The service supervisor informed me GM investigators were going to the dealership to inspect the failure. I found a GM service bulletin dated June 2016, bulletin number pit5361B describing this failure. I am in the process of trying to get GM to pay for the damages since the truck is less than 5 year old and has less than 100000 mile on it, it has about 45000 miles on it. This part is not a part that is expected to wear of inspected during normal maintenance.

- Wayne, NJ, USA

Brakes are failing at low speeds. From other reports it seems to be the brake vacuum pump. While driving in stop and go traffic, I nearly rear ended the vehicle in front of me. The brake pedal would not move no matter how hard I pressed. This happened again backing out of my driveway and only the curb across the street stopped the vehicle.

- Pace, FL, USA

At 61K miles, when backing up slowly, generally into a parking space, the brakes freeze. Only after pumping them or putting the truck in park, do the brakes compress again. This has happened at lease 4 times in the passed 2 weeks.

- Dallas, TX, USA

I was travelling at roughly 70 mph on the freeway when we encountered and unexpected road crew I applied my brakes firmly and slowed to approximately 40mph and changed lanes to avoid the hazard.. almost instantly I was cutoff at the slower speed and needed to apply my brakes again, this time the pedal was firm and the vehicle did not react. I avoided the collision by swerving into the next lane. The pedal had no affect on stopping the vehicle in this situation.

- Plymouth, MI, USA

My vehicle was in motion I started hearing a loud noise as I was coming to yield because of slow traffic it was hard for me to brake I was having difficult time braking I would have to press brake all the way down for it to come to a very slow and long distant stop I had to get off the highway and had to get my truck towed it was very dangerous I took it to the dealership they told me my warranty didn't cover it so I had to pay it ended being a brake hose that busted I payed about $850 and I have the receipt for it from the dealership I felt very scared this situation is very dangerous had to get a rental that I payed for while I waited for my truck to get repaired.

- Paramount, CA, USA

On two separate occasions while traveling at low speed, my brake pedal became hard and would not function normally. After using a great deal of force on the brake pedal I was able to stop the vehicle but exceeded the distance at which I was trying to stop within. Thankfully a collision did not occur and there was no harm to anyone.

- Bulverde, TX, USA

The contact owns a 2014 Chevrolet Silverado 1500. While driving various speeds, a sudden chime sounded. Next, the power steering and power brakes suddenly malfunctioned and the steering wheel became difficult to turn in either direction. Also, the brake pedal had to be depressed with force to stop the vehicle. The vehicle was not diagnosed or repaired. The manufacturer and an unknown dealer were notified of the failures. The failure mileage was 54,000. The VIN was unknown.

- Temple City, CA, USA

Brake pedal pressure significantly increases after a series of brake applications at low speed. Brake pedal becomes very firm and pulsates, stopping becomes very difficult. Pedal feel returns to normal after driving a short distance but the issue returns after a series of brake pedal applications in a short time span. First noticed in a parking lot as pulling into a space, but problem repeated on city streets as pulling up to stop lights or in city stop and go traffic.

- Phoenix, AZ, USA

During low speed braking power assist is lost and braking is difficult. Vehicle takes longer to stop.

- Belmont, NC, USA

Drove 35 miles. Stopped ok. Backed up about 5 mph. Brake pedal would only push down about one quarter inch with no braking action. Pressed as hard as possible and got slight braking. We had it repaired at a shop and they said it was a vacuum pump and a sensor that had gone bad.

- Coeur D Alene, ID, USA