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  1. #1
    Master Mechanic
    GM_Guy's Avatar
    Join Date
    Jan 2007
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    kansas
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    743

    Question strange brake condition

    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????
    Jeff

    1968 Chrysler Imperial Crown 4 door ht ~ resto project
    1984 Buick Le Sabre 4 door sedan~daily driver






    BUY ONLY GENUINE ACME PRODUCTS



  2. #2

    Default

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



    Jamie

    2007 Ford E250(Work van) (Ya, Ya, shut up!)
    1996 GMC Sierra SLE 1500 5.7L/4L60E

  3. #3

    Default

    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.

    Technology is great, when it Works,
    And one Big Pain in the Ass When it Doesn’t.
    Detroit Iron Rules, All the Rest are Just Toys.
    94 GMC Burban, 5.7L (350), 4X4, Auto
    86 GMC Burban, 350, 2 WD, Auto
    79 GMC pickup plow truck, 400, Full time 4X4, Auto
    86 Pontiac Fiero SE, 2.8L, Auto, only mid engine American car
    See a Pattern yet?

    15 year GM assembly line worker.

  4. #4
    Legend
    TrailLeadr's Avatar
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    Jun 2005
    Location
    Coventry, Rhode Island
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    3,103

    Default

    To me it sounds like bad master cylinder.
    Patrick
    Rhode Island


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