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Q: 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.
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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
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.
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