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strange brake condition

Discussion in 'Chevy Uplander & GM Minivan Forum' started by GM_Guy, Jun 9, 2007.

  1. GM_Guy

    GM_Guy Epic Member 5+ Years 500 Posts ROTM Winner

    I am having a brake issue in My 82 GMC van. when I press on the brake, normally it will be firm, other times it will start firm, then go to floor slowly, setting the brake light. when this occurs, I press down hard, and light goes out. do I have something to worry about????
  2. Cableguy

    Cableguy Epic Member 5+ Years ROTM Winner 1000 Posts

    I'm not liking the sound of that Jeff. Have you checked top to bottom for leaks in hydralics? Resevior to bleeder screws.
  3. 84fiero123

    84fiero123 Epic Member 5+ Years 1000 Posts Platinum Contributor

    Air in the lines,

    Leak in the lines,

    Leaking master cylinder,

    All dangerous and should be corrected immediately.

    Look for wet spots near any brake part, lines.

    Then fix.
  4. TrailLeadr

    TrailLeadr Epic Member 5+ Years 1000 Posts

    To me it sounds like bad master cylinder.

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