With less than 9,000 miles driven on the vehicle, the entire brake system failed as I was driving. I have since learned that there was a faulty master brake cylinder installed when the vehicle was built. No brake fluid was getting to any of the brakes. When the incident occurred, I was able to pump the brake pedal all the way to the floor in order to get the vehicle to stop. I felt the power brakes go out, the service light started flashing on the dash, and several warnings popped up. These warnings included: "Brake System Failure", "Speed Restricted", and "Hard Braking Required". Even with hard braking it was difficult to get the vehicle to stop. I was very lucky that I was not travelling at a high rate of speed and was on a low-traffic road when the incident occurred. Had it been 2 minutes later I would've been on a major interstate and could've put my own and others' lives at risk. The vehicle has been diagnosed by the dealership I purchased it from and will be in their position for the next month while waiting on a new part.

- Wichita, KS, USA

While car was in motion a warning suddenly came onto screen stating "Brake assist problem, service asc, vehicle speed will be reduced for safety". Pedal was very hard to press, and was almost impossible to stop car with the speed less then 20 mph when the problem occurred. Dealer reports that the Master brake Cylinder needs replaced. This car has less then 500 miles on it at time of occurrence. At this time I am unaware if part is being evaluated as a safety issue. The dealer has been unable to get GM to provide a replacement part.

- Lewiston, ID, USA