Okay, so brake lines, calipers, pads, rotors and even the master cylinder has been replaced on a '99 chevy blazer. The dilemma is that the system bleeds and pressurizes fine with the engine off. However, as soon as the engine is started, the brake pedal is going to the floor. Basically, we are unable to maintain a pressurized brake system once the engine is started.

Cars & Trucks - Chevrolet - Blazer - 1999 Chevrolet Blazer