Brake Problems (2 wheel drive) on 2001 GMC Sierra 3500

Brake pedal goes to the floor when applying. I have new rotors and pads all away round the truck, new master cylinder, but the brake pedal still goes to the floor when applying the brake.

by in District Heights, MD on June 14, 2011
1 answer 1 comment
ANSWER by on June 14, 2011
Everything - including the master cylinder itself - needs to be re-bled. Start with the master cylinder - bench bleed it. Then bleed each wheel. Then repeat each wheel to be sure.
COMMENT by on June 15, 2011
Already bleed brakes and master cylinder quite a few times and pedal still goes to the floor when applying the brakes.