Question about 1994 GMC Sierra

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Brake problems, soft brakes must pump brakes f

Brake problems, Backing up, the brakes work fine, must pump the brakes to stop going forward. Fluid in master cylinder is at correct level. Do I have a bad master?

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More than likely you do have a bad master cylinder. Replace it as soon as possible beause it will progressively get worse.

Posted on Jun 02, 2010

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Have one person pump up the brakes several pumps and then hold the brake pedal down with pressure while the other goes to the wheel and open & close up the bleeder valve - the pedal should then go to the floor.... Repeat as needed.,. keep in mind you will be loosing brake fluid and may have to refill.

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by repressurize, do you mean 'pumps up'. If everytime you hit the brakes (allowed to sit for a few moments between uses) it starts applying the brakes near the 'normal' pedal position, then it sounds like the master cylinder has gone bad.

Other less likely causes, lots of water got in the brake fluid (assuming nonsynthetic brake fluid) and has turned to junk.... Might try power bleeding the system, but my bet is the master cylinder.

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have ya,ll checked the rear differetial fluid level.if u have an need more help feel free to email me at bertman285@hotmail.com

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