Brake vacuum pump loses pressure when brakes pressed repetitively. While in traffic I rear ended another motorist due to brake pressure loss. Causing damage to both vehicles. No injuries due to low speed but even at high speeds brake pressure is lost, if the brake pedal is depressed repeatedly you lose all brake assist. Vehicle was brought in for recall regarding ABS software update but brakes still feel horrible. Tsb was issued to vehicles under 72000 but only began this year. Current tsb does not cover my vehicle. I contact the GM regarding this issue and they told me that they will not cover my vehicle one make exceptions.this needs to be a full recall of the vaccum pump, vacuum line and master cylinder like stated in the tsb. Someone can die from this issue if going down hill at speed.

- Elmont, NY, USA

The contact owns a 2015 Chevrolet Tahoe. The contact received a recall notice for NHTSA campaign number: 19V645000 (service brakes, hydraulic). While driving various speeds, the brakes grabbed when the brake pedal was being depressed. There were no warning indicators illuminated. The vehicle was taken to boulevard Buick (2800 cherry ave, signal hill, ca 90755, (562) 492-1000) where it was diagnosed that the brake pads and rotors needed to be replaced and a wheel balance was needed. The dealer also stated that the vehicle was working as designed. The vehicle was repaired. The manufacturer was not contacted. The failure mileage was 89,917.

- Long Beach, CA, USA

The contact owns a 2015 Chevrolet Tahoe. While driving approximately 15 mph, the brake pedal was depressed, but failed to stop the vehicle. The vehicle was towed to an independent mechanic who diagnosed that the vacuum pump needed to be replaced. The vehicle was repaired. Elm Chevrolet (located at 301 E church St, elmira, NY 14901, (607) 734-4141) and the manufacturer were notified of the failure. The vehicle was included in and repaired per NHTSA campaign number: 19V645000 (service brakes, hydraulic). The approximate failure mileage was 73,000.

- Horseheadd, NY, USA

Service brake assist came on and vehicle is very hard to stop even when applying enormous pressure on the brake pedal. This accrues at lower speeds and is very dangerous to the consumer.

- Saint Rober, MO, USA

Brakes were faulty. The car was not stopping at slow speeds. After going back and forth with dealer and showing them the 'diagnostic tip' out for this known issue, they replaced vacuum pump free of charge. I asked why they didn't replace the other items listed as recommended on the notice. Now 7 months later, the other parts are leaking and need replacement. This should have been replaced at same time.

- Lake Mary, FL, USA

Intermittent problem where excessive force applied to brake pedal is required to stop vehicle while in motion or keep the vehicle in a stopped state. This primarily seems to happen in traffic where frequent stops at idle speed is common. Contacted GM dealer for resolution and was told that vehicles vacuum pump would be replaced under a special warrant if the vehicle was under 70000 miles. Consequently the vehicle was slightly over this and warranty would not be honored.

- Catoosa, OK, USA

Brake pedal not responding. Pushing the pedal at a drivethru window and kept moving. Had to jam on the pedal all the way to the floor to finally stop, put in park. Luckily no one in front of my to hit. Able to duplicate problem several times; mainly when coasting and at slow speed. Braking at driving seems to work better, still seems to be off though. Was able to slowly return to work, with another employee following, and park. Parking was difficult, thought I was going to go down the bank! had to use the E-brake. The vehicle is going to the dealership tonight! I refuse to drive with this problem!

- Summerset, SD, USA

2015 Chevy Tahoe, we purchased two months ago still under factory warranty. I was turning around in the driveway, hit the brakes, and the brake pedal wouldn't move. It was extremely stiff, causing me to crash the vehicle into my utility trailer. I pushed as hard as possible and nothing happened. There was almost no braking pressure at all and my SUV just kept going. I purchased this vehicle for my family but now everyone is scared to ride in it. I've financed a vehicle for years that I've had posession of for months, and it's most nesscery saftey function has failed. I'm extremely disappointed. I've always owned GM vehicles. As a 31 year old father of 3 small children, this was a very large purchase for our young family. Now I feel I may have to look outside my trusted brand to find a safe vehicle I can Transport the most precious cargo in. It's very disappointing. I then find out this exact issue has caused multiple crashes involving injuries. GM is aware this is a problem, lawsuits have been filed, yet little or nothing has been done. How can General Motors knowingly turn a blind eye and allow this life threating saftey issue to go on in a vehicle marketed to families?

- Spencer, OH, USA

While driving with my children in the car my wife experienced a near sudden deterioration in braking performance. The brake pedal became very stiff with little or no travel in pedal regardless of pressure applied. This deterioration in braking performance became critical - requiring all the force my 100lb wife could muster to bring the car to a stop. The stiff pedal was obvious with the car on and off, moving and stationary. Though the problem occurred and was recognized only after the car was in motion on I84 (at 65 mph!!). our mechanic identified the vacuum pump as the cause of the issue.

- Ridgefield, CT, USA

At low speeds, or idle, the brake pedal becomes very hard to depress. Loss of power boost resulting in extreme effort to activate braking. This happened while stuck in a traffic jam travelling at speeds of less than 10 miles per hour for approximately 15 minutes. Problem lasted until traffic returned to normal speed, when braking returned to normal. I believe I have the same vacuum pump problem being cited by other owners.

- Plano, TX, USA

Lost all brake boost while backing a boat down a steep boat ramp. Was able to stop, but I'm sure a smaller person (like my wife) would not have been able to. The repair shop replaced the vacuum pump. I now understand this is a common, known GM problem.

- Spicewood, TX, USA

Brakes randomly started not working. A lot of resistance, unable to stop, unable to push brake to floor. Finally got somewhere and parked after avoiding three accidents, vehicle had to be towed. Brake booster is bad. This seems to be a common problem with the 2015 Tahoe. Why hasn't this been a recall"??"

- Melbourne, AR, USA

After reading the large number of similar problems with the 2015 Tahoe and after speaking with individuals in this area in business with GM, I feel even more unsafe than I have before. I was told that although numerous problems and multiple lawsuits with the 2015 Tahoe's, that there has been no total recall with my specific VIN number. Shocking. I did see several recalls of great concern that I had not been made aware of. It's a hardship to have my vehicle in the shop more than it is in my garage. It's a hardship to pay to rent a working, safe vehicle because the one I pay $615 monthly for is unsafe, unreliable and a liability. In conclusion, are there steps an individual is able to take to resolve situations such as this" or is this something that one would need to seek assistance of legal aide to get the ball rolling"

- Melbourne, AR, USA

Transmission completely went out at 104,000 miles, requiring new transmission. Entire air conditioning system had to be replaced today the brakes stopped working suddenly- waiting for diagnosis. Vehicle had to be towed. Almost in three different accidents trying to get somwhere and get stopped. Catylatic convertor needs to be replaced and currently has three codes related to it showing. This vehicle has been problem after problem since day one.

- Melbourne, AR, USA

Upon pressing brakes headlights flash, interior light flash, oil gage and rpms fluctuate all over. Stabilitrack sensor comes on. Upon accelerating to about 60-65the car brakes for itself. Doors lock, lights flash. Losing power steering when shifting gears

- Coshocton, OH, USA

Pulling into garage at low speed and brakes didn't work properly. A significant amount of pressure was required to stop. I pressed with both feet and barely was able to get vehicle to stop before crashing into the house. The vehicle was in motion.

- Miami, OK, USA

Driving my car today and had a huge issue with my brakes. When backing out of parking space and noticed someone walking behind me and hit the brakes, it was like they were stuck. After a couple of seconds they finally gave and stopped, so I just thought maybe it was a fluke. This happened while I was 2 hours away from home. Then on drive back home, I got stuck in bumper to bumper traffic because of an accident on the interstate. Traffic came to a complete stop, so I hit my brakes and same thing, they were stuck (would not move). After about 3 seconds of pushing them as hard as I could, they finally gave and just barely missed hitting the car in front of me. I finally searched the internet to see if anyone else had experienced this problem. I was very shocked to see this is a known problem! this is a huge security risk! I was almost in 2 separate accidents today because of a known problem! shouldn't someone be notifying Tahoe owners of this issue to keep the public safe?

- Franklin, TN, USA

I was driving straight in the parking lot at a slow speed (leas rhan 5 miles) preparing to stop for people crossing. The brake did not work and the car kept rolling almost hitting a person. I pulled into a spot towards the end of the parking lot and the brakes continued to not work even when pressing with 2 feet. Per Chevy dealarship I have to pay to have the brake vacuum pump fixed. Minimal explanation needed when I brought my car in, service guy knew exactly what I was talking about without asking any questions.

- Kenner, LA, USA

Brakes became extremely hard to apply while maneuvering at low speeds, almost caused a collision.

- Greensburg, KS, USA

Brake pump failed and needed to be replaced. GM knows of this problem and should do something about it before lives are lost, people are injured or property is damaged (from this point forward).

- Dallas, TX, USA