-Vacuum pump malfunction. Not available, has already been repaired. Found out after the fact there had been a recall on 2014-2018 vacuum pumps. Mine had not been included in the recall, yet here we are. -While pulling into a parking spot, as I was slowing down/braking the pedal went to the floor, truck accelerated went over a parking barrier, sidewalk and hit a tree. If I had not hit the tree, I would have driven into the side of the building into people doing cardio or if someone had been walking in front of me, I would have hit them. Seeing an orthopedist on June 10 for right hip and knee pain as leg was fully extended on impact. -Quality GMC Collision/Service tested/drove the car and it didn't happen. Service ran diagnostics and it happened then. Highlighted in yellow on repair invoice. -Quality GMC Collision/Service. don't know if an adjuster looked at it or not. Quality did file a claim for it though. - There was no warning, indication, message, problem before this happened. My brakes were were working and then they weren't.