The contact owns a 2017 GMC Sierra 1500. While driving approximately 20 mph, the brake pedal was depressed and traveled to the floorboard. The brakes failed to adequately slow down the vehicle. Prior to the failure, the vehicle was taken to mastria Buick GMC (1525 new state hwy, raynham, MA 02767, (508) 880-7000) to be repaired per NHTSA campaign number: 19V645000 (service brakes, hydraulic). The contact stated that the failure recurred twice after the repair. The manufacturer was not notified of the failures. The approximate failure mileage was 40,000.

- West Bridgewater, MA, USA

Lost brake assist. Coming to a stop the brake pedal whet to the floor and the anti lock brakes started chattering. The brake pedal was hard as a rock and took 2 feet to stop. I was on a 170 mile trip and almost hit someone 2 times.

- Miller Place, NY, USA

Original issue: Brake pedal hard to push and truck did not stop normally at low speeds. Could reproduce issue usually pulling into a parking spot. My vehicle would have hit car in front of me if I hadn't used ebrake. Took to dealer, dealer applied software update to braking system. Upon pickup I discovered the original issue persisted and now had an additional issue. Now at almost every brake event, the ABS would engage and cause the brake petal to chatter/vibrate. Dealer and GM customer service tried to tell me that was normal after the recall update. I told them that couldn't be normal. It wasn't happening before. After not excepting that as a fix, the dealership started looking for other possibility's. after telling the dealer I was going to take the truck somewhere else they decided to replace the vacuum pump. The new vacuum pump fixed both issues! I'm just saying if the recall update is causing more problems then what it was intended to fix. Now there could be a more serious problem on the highway. Please look into these issues. I feel like GM is trying to hide a big problem.

- Georgetown, KY, USA

I has some issues with my brakes when stopping at a red light. I stepped on the brakes and kept rolling forward and almost hit the truck in front of me. I thought it could be my pads worn down so I drove cautiously for a few days. I got a call a few days later from the dealership where I brought the truck from saying my on star notified them of a recall on my truck pertaining to the brakes. I thought good this could fix the problem. I took it by the dealer and they said it was a software update, and they did the update. I also asked them to take a look at the break pads so I could rule it out or do something about it. They said I have 60% of my brake pads still left. The next day I was going to work and I got to the parking garage where I work and noticed it was doing it again. I pressed down on the brakes to back up and I kept rolling forward and had to press down hard and to the floor so I could stop. So far there was not a crash but I feel its only a matter of time. This is a major safety issue for me and my family and feel there should be some sort of recall to fix this.

- Falls City, TX, USA

A few times my brakes while going slow would get very tight and not work. Well today after church I was leaving the parking lot. As the car in front of me moved forward, so did I. when I tried to stop I couldnt. My brakes got hard and went to the floor and I ran right into the car in front of

- Wooster, OH, USA

Anti-collision system is activated, I apply breaks, break peddle is soft and goes to the floor, I swerve to avoid collision and quickly pump the breaks to regain peddle and apply breaks again (this time brakes engage). 6 different times this has happened. 4 times on the interstate during rush hour and twice on a highway. Car in front of me slammed on the breaks cause the system to activate and me to react. It appears the system overrides the brakes taking control away from me. However, the system does not brake the vehicle. Another occur was when I was launching my boat into the lake. I was backing up and lost brake pressure and had to apply my emergency parking brake to stop my truck from going into the water. This vehicle has been checked by 2 different dealers, 4 different times in the past year. I do not feel safe driving this vehicle. The date listed below was the last occurrence when this happened. (not the prior 5 occurrences)

- Burnsville, MN, USA

Total brake failure. The pedal became hard as a rock with no advance warning. I received a notice (N182202780) from GM stating that I might experience increased brake pedal effort. It went on to say how this notice "is not a reacall" and that brakes still meets "all Federal Motor Vehicle Safety Standards for brake performance" I'm writing to bring attention to the fact that my truck experienced no symptoms of a problem until the pedal had maybe 10% assist. No check engine light or notice from the drivers info center. I applied the brake, shifted into drive, accelerated then applied the brake to stop and maybe had 10% braking ability. The notice also went on to say that "failure to follow recommended oil change intervals could contribute to this condition". the truck has 32000 miles on it, I've owned it since new, I have always changes oil with 20% life left in it. This is about 2000 mile sooner than the manufacturer recommends. This is a very serious condition that GM has recognized in there letter, but in my opinion, are not taking it serious enough. Unless I'm a "one off" case, this will very likely get people hurt and property damage if not addressed very soon. Please look into this, thank you

- Petaluma, CA, USA

Stopped at a stoplight, no problem. After a few seconds truck started to roll forward. Had to apply tremendous pressure on brake to stop vehicle. Problem continued until I was arrived at destination a quarter mile away. Occurred several more times. Cut vehicle off and when restarted it occurred once and then returned to normal operation.

- Punta Gorda, FL, USA

The contact owns a 2017 GMC Sierra 1500. The contact stated that while attempting to brake, the brake pedal was stiff and very difficult to depress. The contact mentioned that the ABS in the brakes was vibrating. The vehicle was not taken to a dealer or independent mechanic for diagnosis or repairs. The manufacturer was notified of the failure. The approximate failure mileage was 32,000.

- Punta Gorda, FL, USA

Vacuum pump, brake pedal stiff when reversing, hard to stop.

- Pearland, TX, USA

The brake pedal becomes extremely stiff when trying to stop at slow speeds, especially in parking lots. The vehicle becomes very difficult to stop almost causing crashes. GM dealership repeatedly tests vehicle and tries to claim there is nothing wrong and I'm making a mistake. Had to take vehicle in several times and eventually they found a failed vacuum pump. They tried to make me pay $700+ for the repair even though its a known issue. They are trying to avoid doing a recall and putting their bottom line ahead of safety. These trucks are dangerous.

- Lansing, MI, USA

The brakes are not working at slow speeds. I was parking in a parking garage while pulling up to the concrete wall and pushing on the brake the truck almost didn't stop and the pedal got very stiff. While driving home in traffic the truck did the same thing and I almost hit the car in front of me. It seems to be at slower speeds and the brakes are losing all power. The truck is only 2 years old and normally stops on a dime. Took to the dealer today, and they said the vacuum pump is bad at only 39,000 miles.

- Yukon, OK, USA

Faulty brake vacuum pump leading to reduced braking force under repeated use or in a pannic situation leading to a collision. I hit a deer because I was unable stop or sufficiently slow down to avoid hitting it. I noticed reduced braking force and a hard brake pedal. I have read of several reports on the internet involving this issue

- Culloden, WV, USA

Breaks have out at 36.5K miles. Vacuum to break line messed up. Was in busy traffic going 50-60mph. Traffic slowed down but truck would not break. Very very scary situation. GMC dealership knew exactly what the issue was over the phone. Took it to them and car was out of warranty by 500 miles. 800$ out of pocket and took them 10 seconds to identify once the vehicle was at the dealership. Seems like they know the issue very well

- The Colony, TX, USA

I had the rotors replaced on my new truck at 6000 miles and paid for repairs out of pocket. I continued to hear brake noise. On my way to the dealership on the weekend I was scheduled to have the brake noise investigated and to have an oil change done, I had catastrophic brake failure. A vehicle in front of me made a lane change into my lane and then slammed on the brakes in front of my vehicle at a green light coming to a complete stop from 40 mph to 0 in the middle of the intersection. A car had pulled out in front of him changing lanes from the left lane to right. I mashed the brake pedal to stop immediately and my brakes went soft and to the floor on the second push. When I wasn't stopping. I slammed my emergency brake with my left foot and injured a few toes on my left foot trying to stop before my vehicle. My vehicle did not come to a complete stop. Instead, my vehicle skidded and lightly tapped the vehicle in front of me doing minor bumper damage to both of our vehicles. However there was a Toyota truck behind me, and struck my vehicle directly while I was at a stand still, while the driver was doing over 70 mph when he collided with my Sierra. My Sierra has the pin or part of the caliper that moves the brake pads, completely pushed the piston into the rotor. The vehicle has had brake issues since I paid to have the brakes and rotors replaced at 6000 miles. I have records of the incident and the brake failure from a mechanic and auto body shop documenting the complete failure of the brakes. Directly after the brakes were replaced within another 8000 miles the brake booster on the vehicle went bad and was replaced as well.

- Auburn, CA, USA

'takata recall' driving the truck to the store, when I was parking the brake pedal got extremely hard, lost all brake functions. Immediately took the truck (2017 GMC Sierra 1500) to the dealership they told me it was the vacuum pump and belt. Had it replaced under the warranty on no additional cost.

- Blythewood, SC, USA

After exiting I285 North of atlanta onto the ashford dunwoody exit, my breaks stopped working and the pedal would not press down. I was in motion at the time and happened to be moving up an incline. I had to down shift from drive into a lower gear and use the emergency break to avoid a collision with the car in front of me.

- Clermont, GA, USA

Vacuum pump issue with GMC Sierra - I noticed a problem braking my pickup, spongy brakes, hard stopping. I took it to my local Chevy dealer (portsmouth Chevrolet, portsmouth, nh). They diagnosed it as a problem with the vacuum pump and replaced the pump under warranty. I wanted to alert you because I saw a notice on fox news this evening about your investigation of the problem with earlier models and wanted to alert you that mine is a 2017. You may want to expand the investigation to include later model trucks and SUVS. Luckily I caught it in time, no accidents, no injuries.

- Cape Neddick, ME, USA

Vehicle has hard shift at 5-6 mph. Dealer stated could not find issue, and reflashed tcm.approx month later, at 10K miles, truck hard shifted from red light on highway, once up to 45 mph, shutdown. Steering wheel locked up, no brakes, no control of vehicle at 45-50 mph.dealer kept for one week, stated loose cable on starter from battery. Exactly 1K miles later (5 weeks), now at 11K miles, truck hard shifted at 5-6mph, and at 45-50 mph truck tried to shift in 4WD. All lights on dash came on as a result. Dealer has currently had the truck for two weeks and can not find issue. They supposedly consulted GM, and instead of sending an expert tech to help dealer find issue, advised dealer to replace ECM. Replacing ECM is the general answer to not sure what is wrong. This truck is a safety issue, as when it shuts off going 45-50 mph there is no control or brakes operational on the vehicle. GM will replace the ECM, and just like right now, will not be able to replicate the problem, and expect me as the consumer to take delivery back of the vehicle. Currently all of my documentation is in the dash of this truck, at the dealership. Trying to determine how myself as the consumer can help ensure this safety issue is corrected, and not passed on.

- Milner, GA, USA

Was stopped at stop light, with foot on the brake. Started rolling forward and had to press harder on the brake. When holding foot on brake pedal and in gear pedal slowly moves down to the floor. Took vehicle to dealer who was luckily close by. They tested truck brake's and found the same thing. They kept truck, and repaired the next day. Master cylinder was bad. They believe that a seal may have a crack, or a nick in it, allowing pressure to release. The dealer said more than likely GM will ask for part to examine it, so they can't take it apart. Truck had 3173 mile's on it.

- Pepperell, MA, USA