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Help! Vacuum Diagram Needed

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by tlsmikey, Apr 8, 2006.

  1. tlsmikey

    tlsmikey Newbie

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    I need some help guys. I have a 1977 GMC K10, 350V-8, Quadrajet.

    The truck has had a new painless wiring kit installed, new motor ..etc. The bad news is that I never took pics of the vacuum lines and threw away all of the old crusty ones. I can't figure out where the lines are supposed to go. I've looked at Haynes and Chelton. Both have horrible diagrams.:mad:

    Does anyone have access to the factory manuals? Anyone have a vacuum diagram for this type of truck?
     
  2. AZ79K5Project

    AZ79K5Project 1/2 ton status

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  3. dlferry

    dlferry Registered Member

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    Send me your email and I will forward you what I have found for a 78
     
  4. tlsmikey

    tlsmikey Newbie

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    Vacuum Diagram

    Those vacuum diagrams look like the same ones from the Chelton manual. They're a good start but if you look at the one for the 350 V-8, heavy duty, california model (what I have)....you'll notice that there are several connections open. I'm trying to figure out where those connections go. I also have what looks like a small round vacuum reservoir with two fittings. I'm assuming one goes to the carb (ported line), but I have no idea where the other one goes.

    You can email any diagrams at tlsmikey@sbcglobal.net.

    thanks for all the help so far and keep it coming.
     
  5. TEXICAN

    TEXICAN Registered Member

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    313 Hp and 387 ilbs. The transmission leaks so i was gonna replace the seals i wasnt sure if need a upgrade any thing.
     

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