On two occasions in the past week my brake pedal has become extremely stiff at low speeds and caused the brakes to fail. The first incident occurred as I approached a stop sign on a busy city street. My brake pedal became stiff and the brakes would not stop the vehicle. Causing me to roll into the path of another vehicle. I managed to stop and the other vehicle avoided me. The second incident occurred this morning as I backed into my drive way. As I attempted to stop my pedal became stiff and the brakes would not function properly. Despite stand on the brake pedal I was unable to stop my vehicle before it struck my utility trailer. Thankfully no damaged occurred. I contacted the parts department at mission Chevrolet in el paso, Texas and was advised the part is in heavy demand and will be unavailable for 7 to 10 business days.

- El Paso, TX, USA

While backing up vehicle, at a slow speed, gravel driveway, backing down hill, brake pedal became hard and required a considerable amount more braking effort with much less effect. After vehicle was stopped and moved forward, this was still present. Vehicle was again stopped and then power cycled. This returned the vehicle to normal.

- Arkport, NY, USA

Brake pedal gets hard, and brakes are not working, it seems to happen more frequently. Usually at low speed, and it has made it interesting at parking lots, or stop & go traffic, and parking in our driveway. We have checked everything, and couldn't find anything wrong. Googled the symptoms, amd it appears this is happening to more Chevrolet Silverado than mine, and the tech's say it's a brake booster pump issue. I think Chevrolet need to fix this issue, since it's happening to several trucks, it's not just a flawed pump, but more likely a pump weekness overall. Happened first time a year ago, when in a ferry lane, and the speed was walking speed, and we barely managed to stop before we hit the car in front of us.

- Warden, WA, USA

At low speeds with the brake pedal pushed in the truck still rolls. On three occasions over the last 6 months this has happened and almost caused multiple wrecks. Once was in the mountains, once was turning on a curve, once was on a straight flat black top.

- Bel Aire, KS, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving 15 mph, the brake pedal was depressed and failed to operate. As a result, the vehicle crashed into a tractor trailer. The air bags failed to deploy. A police report was not filed and there were no injuries. The contact was able to park the vehicle. The contact called gengras Chevrolet at (860) 748-4355 (585 Connecticut blvd, East hartford, ct 06108) and was informed that they were unaware of any brake failure. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 68,000.

- East Hartford, CT, USA

At low speeds while in motion either in traffic, driveways or parking lots the power brakes would stop working causing the truck to not brake properly. The brake pedal became very stiff and would not stop. While this did not cause any accidents, it was a near miss on several occasions. I took it to the Chevrolet dealer where they said the brake "vacuum pump has failed". they stated it was not covered under warranty and would cost $700.89. The pump was replaced on 11/28/2018, with no occurances of this issue since. The truck had 59,108 miles on it at the time of vacuum pump replacement. The first brake issue was around 50,000 miles and happened about 8-10 times between June and November 2018.

- Castroville, TX, USA

Driving down single lane road I began to stop for red light, as I began to depress brake pedal but it was stiff and had significant effect slowing my truck. I drove of right side of road into wet grass too avoid collision of SUV stoped in front of me. There was no loss of control or damage done to exterior of truck or myself. As I'm almost completely stoped the side curtain air bags deploy for no apparent reason causing sever damage it the interior panels, headliner and both front seat belts that have that contain small charge permintly lock and now are un usable.I was only person in truck but the passenger front seat belt is retracted and locked guitar string tight.

- Baytown, TX, USA

I was parking my truck in a parking lot space, and when the truck was moving slow, I applied the brakes, and had to push very hard on the brake pedal to get the truck to stop. I had a local dealership run a diagnostic on the truck, and it came up as a faulty brake vacuum pump.

- West Concord, MN, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving approximately 50 mph, the brake pedal became really stiff and did not function. Also, the brake assist failure indicator illuminated on the instrument panel. The vehicle was driven to the contact's residence and later taken to classic Chevrolet of sugar land (13115 southwest freeway, sugar land, tx 77478). The dealer determined that the VIN was not included in NHTSA campaign number: 18V578000 (service brakes, hydraulic) and the repairs had to covered by the owner. The manufacturer was notified of the failure. The vehicle was not repaired. The approximate failure mileage was 117,000.

- Houston, TX, USA

It would roll even with the foot on the brake at low speeds faulty air pump had to get air pump, tube, air pump belt, alternator belt, air condition belt that cost me $700.

- East Bridgewater, MA, USA

Driving at slow speeds especially parking the brake pedal gets hard to depress and braking power is almost non-existent. This has been happening on and off since 30,000 miles and now daily at 60,000. The ABS indicator has gone on and off and the check engine light is on constantly now.

- Saint Paul, MN, USA

The vehicle braking system become rigid at low speed (approx 3mph or so) as if the power brake system fails. The vehicles stopping distance changes and the vehicle continues to roll while pressing the brake pedal toward the floor. This issue resulted in damage to my garage door while backing the vehicle into the driveway. The issue is best described in the pending investigation regarding the GM braking system located under Chevrolet Silverado recalls. I was made aware of the investigation after researching the issues I have had with my vehicles brakes. The investigation statement describes the issue as a problem with degrading brake vacuum component.

- Whittier, CA, USA

Multiple times at low speeds, usually parking or in stop and go traffic, I lose all braking power. It's terrifying when it happens. I have to put my full body weight (I'm a 200lb male) on the brake pedal and I mean I barely can bring it to a stop. Luckily I haven't hit anything in the time it took from the first occurrence of the problem until I could afford to get it fixed. The problem was figured out to be a bad vacuum pump. From what I can tell online, this seems to be a very widespread issue with not many owners reporting their problems. This is very dangerous, I couldn't imagine that happening at high speed, as reported by others. It's almost impossible to stop the vehicle when the brakes do that. Just trying to help prevent serious accidents.

- Sammamish, WA, USA

I have a 2015 1500 Silverado and it is having brake issues. The peddle becomes hard to depress and the truck will not come to a stop. I have noticed this several times coming to a stop at low idle on the street. I dropped it off at the dealership only for them to tell me it would be $1100 and GM did not have a recall on it. They said the vacuum pump and several other things would need to be replaced in order to fix this.

- Chesapeake, VA, USA

At low speeds, the brake pedal becomes very stiff. It is hard to stop vehicle. It happens in forward and reverse.

- Vandergrift, PA, USA

2015 Chevrolet Silverado 1500. Consumer writes in regards to power steering. The consumer stated ABS system and stabilitrak light illuminated. The consumer was made aware of a recall concerning the steering failure after having the vehicle repaired. The consumer requested to be reimbursed for the repairs.

- Awendaw, SC, USA

I unerstand that you are already investigating the braking braking problem at slow speeds, I have been experiencing the same problem for some time, can you please add me to your complaint list, and keep me informed of any results, thanks (xxxxx) parts of this document have been redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6)

- Spring Lake, NJ, USA

Vacuum pump for brake system and hose/tube that connects to the pump had to be replaced after I lost brakes completely while driving the vehicle with my two year old daughter in the back seat!! the vehicle had to be towed to auto repair shop. Mileage was at 55,096. This happened while in a drive thru line at chic fila. Brakes got very hard and I just kept rolling into vehicle in front to me. I stopped rolling just short of hitting the vehicle. I slowly went through the line to park the vehicle in the parking lot and the brakes were completely rock hard the entire time. I had to simply roll to get where I needed to park slowly.

- Conroe, TX, USA

Whenevr I back the truck up at slow speeds, the brakes temporarily fail for approximately 1-3 feet. Coming to a stop at slow speeds can also cause the truck to take extra distance to stop. I have changed to new brake pads, turned the rotors, and purchased new tires. The truck bounces severely when traveling at speeds over 50 mph on concrete roads. Only on concrete. Asphalt has normal ride as soon as the road transitions then the truck bounces.

- Colorado Springs, CO, USA

Purchased used 2015 Silverado ltz with 87K miles on 12/1/2018 from dealer. On 12/2/2018 while backing out of parking space for first time, brake pedal would only move 1/4 inch with great effort (80-100lbs effort), and only applied enough braking force to stop truck moving 2 mph over 5 or 6 feet. Was able to immediately recreate problem moving forward while under 5-6mph, each time taking roughly 10-12 feet to stop with great braking effort. Problem occurred again 12/3 after a short trip (3 miles, 40mph) while slowly backing into parking space. Put truck in drive and the brake problem persisted. Backed up again, problem persisted. Maximum braking force would not stop truck from rolling down 7% grade from dead stop. Maximum braking force will absolutely not stop truck in stop-and-go traffic when this problem occurs again. **** must drive in far right or left lane to ensure space to swerve into when brakes fail to avoid collision. **** extreme safety hazard - will cause accidents, injuries & property damage. This needs to be a recall asap.

- Charlotte, NC, USA