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Brake Problems

Discussion in '1992-Present Chevy & GMC models' started by 8t7jimmy, Jun 22, 2005.

  1. 8t7jimmy

    8t7jimmy 1/2 ton status

    Mar 2, 2004
    Likes Received:
    West Lafayette, Indiana
    I need some help with my brake problems. The brakes suck. I use to be able to almost lock up the brakes (rear won't lock because of ABS), but now i don't think they would lock up on ice! Also, if you sit stopped for a while the brake pedal will slowly sink to the floor. The truck is a 89 K1500, short bed reg cab. I do have 285/75/16 (33's), BFG ATs but i still have the problem with 265/75/16 (Factory Size 31's),tires.

    Here is what i have done
    New pads all the way around.
    Blead the system twice.
    New master cylinder.
    New brake hoses all the around.

    I think that it is either the problem with the proportioning valve or ABS system. Does anybody have any ideas.

  2. 88sub4x4

    88sub4x4 1/2 ton status

    Sep 22, 2002
    Likes Received:
    Long Island, NY
    Make sure the rear brakes are adjusted properly, then check the proportioning valve, although it may be electronic and be inside the abs unit.

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