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.

Asked by for the 2001 GMC Sierra 3500
2 answers 1 comment
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.
Already bleed brakes and master cylinder quite a few times and pedal still goes to the floor when applying the brakes.
Having the same problem with my 2001 sierra 3500 . did all the same things , but same results. Checking to see if it something to do with the ABS system . If I find the problem their I will let you know . Need Help. bsechrest@jrarv.com