2002 Gmc Sierra 1500 Brakes Work Correctly They Make Almost Grinding Noise

2002 GMC SIERRA
173,000 MILES
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I have a 2002 GMC Sierra 1500. The brakes do not work correctly. They make an almost grinding noise when braking and then the pedal goes to the floor. I have to pump the brakes to get the truck to stop. I have replaced the rear rotors, all four sets of pads, the brake pump module, and the brake pump and the truck still stops like $*. Should I replace the master cylinder and/or the brake booster?
Dec 7, 2012 at 2:09 AM
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HMAC300
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take it to a pro it may need bleeding there is a valve inside abs that requires 2-3 quart of fluid rrun through it an dbled properly
Dec 7, 2012 at 2:28 PM
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