Put truck into park and shut off, started to get out but truck was starting to roll, tried to stop it, pushed on brakes, no effect, kept rolling and gained momentum till it hit our cabin and stopped. Length was 200ft appx of roll. Message center said " press brake to start " which I was doing as it gained speed. Also during roll there was a ratcheting sound all the way during the 200ft roll which in describing it to dealer I was told parking pawl may not have engaged properly causing that sound. I was able to start vehicle after it hit cabin so I could roll it back away from cabin. Started truck after accident, no warning lights on, brakes worked. In rural AZ, on our property when this happened. Taking to dealer tomorrow.

- Heber, AZ, USA

While driving service ESC message and system brake failure message illuminated on center cluster display, attempted to apply the the brakes and pedal went to the floor almost rolled into a busy to lane road in the city. Received an onstar message immediately as well, put truck into park and shut it off and removed the key and opened the driver door, then restarted truck previous messages were gone but check engine light was on. Two days later at the dealership the check engine light was off.

- Saint Petersburg, FL, USA

I was driving down the road, gave it gas to go around a vehicle and it felt like the vehicle shut down. ESC caution, check engine light, and brake warning/caution all illuminated. Vehicle began to slow down drastically and if I hadn't gotten off the road quickly I would have been hit. If I had been turning into traffic from a stop and that happened I would have been hit. Pulled the vehicle over, turned it completely off, removed the key, restarted the vehicle and everything went away except the check engine light. Headed to the dealership and again I gave it some gas and it did it again. Pulled over, turned off/on and same results, everything cleared but check engine light. If this were to happen on the interstate this could cause a major incident. I was on a city street on both occasions. I had to nurse the gas pedal returning to the dealership which was about 7 miles from the initial incident. The vehicle is a 2020 Chevy Silverado 1500 with the 2.7L turbo engine.

- Beaufort, SC, USA

Brake system failure light, steering assist reduced drive no faster than 62 mph service trailer brake, service ESC. Brakes went to the floor and did not want to stop.

- Haubstadt, IN, USA

After parking for about 20 minutes, started the truck and the ABS brake light came on. A warning on the screen said something to the affect...brake above 62 miles failure. Engine light came on. I started driving and noticed no brake pressure. Pressed brake hard, all the way, then truck started to slow down. Luckily there was nothing in front of me or I would have hit it. I checked for break fluid leak under the truck, no leaks. I opened the hood, no leaks noted. I turned off the truck. Waited a minute and started it again. Same thing...no breaks. Break warning lights came on again. I finally called a tow truck for repair.

- Port St Lucie, FL, USA

I was driving down the interstate when traffic began to build up. As I tried to slow down I noticed an extended delay in stopping. No warning lights came on at this point and I continued to drive. I then exited the interstate and stopped at a local grocery store. I started my vehicle back up and began driving to school. I was driving around 40 mph and it was then that my vehicle alarm went off and screen advised that my brakes had failed. I could not stop my vehicle and had no brakes. I then pushed the pedal all the way to the floor board. My truck slowed enough for me to get it into my school's parking lot. I then engaged the emergency parking break and notified roadside assistance.

- Social Circle, GA, USA

2020 Silverado 1500 duramax 3.0 1200 miles and check engine light with codes. I was 300 miles from home so glad it made it. Take to dealer and they tell me I cant drive it because of a failed master cylinder issue. Part is on unknown backorder.

- Hampstead, NC, USA

After having fog lights programed at the dealer, lost brake assist on the way home at last left turn and truck took longer to stop before the turn then normal on a city street speed about 45mph, check engine light came on checked codes at home found 4, P25A2 brake system control module requested mil illumination U0101 lost comm with tcm, U0100 lost comm with ECM/PCM and U0146 lost comm with gateway a. took to GM dealer and was told no problems found and codes were cleared.

- Suffolk, VA, USA

The contact owns a 2020 Chevrolet Silverado 1500. While the contact's wife was traveling through an intersection at an unknown rate of speed, the vehicle did not respond when the brake pedal was depressed. Also, the brake warning indicator illuminated. The contact took the vehicle to an independent mechanic and was informed not to drive the vehicle because the brakes were defective. The contact's wife attempted to drive the vehicle to a local dealer, but the brakes failed again. The vehicle was towed to herb chambers Chevrolet of danvers (90 andover St, MA-114, danvers, MA 01923) where the vehicle was inspected and the contact was provided a loaner vehicle. The manufacturer was notified of the failure and did not assist. The vehicle was repaired, but the contact did not feel comfortable driving the vehicle. The failure mileage was 738.

- Wakefield, MA, USA