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  1. 1973 GMC 6500 dump truck brake problems

    Sorry, it's hydroboost. Power steering pump assists. Whether engine on or off I don't get pedal. I have to pump it up.

  2. 1973 GMC 6500 dump truck brake problems

    It does not have air brakes. Gas engine. High top 427.

  3. 1973 GMC 6500 dump truck brake problems

    Hahaha

  4. 1973 GMC 6500 dump truck brake problems

    It's hydroboost. Regular brakes with hydraulic assist from the power steering pump.

  5. 1973 GMC 6500 dump truck brake problems

    Bought this dump truck to use on my farm. Of course, it's not worth a squirt if the brakes don't work. It has the hydrovac system. The issues are: Won't hold a peddle It's sucking air from I believe what's called the accumulator I think it's the hydroboost because after I pump up the peddle...
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