Question about GMC Sierra

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Brake pedal goes to floor even when truck isnt on. pedal doesnt want to come back up on its own either. replaced booster, master cylinder, shoes, pads, wheel cylinder, cant find any leakes. its a 88 gmc 1/2 ton 4wheel drive sierra.

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Did you bench bleed your master cylinder before you installed it? If not you may not be able to purge the air from it.

George

Posted on May 30, 2010

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