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OK, what is it and why does it exist?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by homemadesin, Oct 7, 2002.

  1. homemadesin

    homemadesin 1/2 ton status

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    Location:
    Castle Rock, CO
    My inner rear panels are off and next to the gas fill pipe there is a 1.25" - 1.5" vertical pipe that is capped at the top. It goes through the bed and underneath there is a fitting that joins it and it appears to be three fuel lines (or vent lines). I don't see any mention of it in either LMC nor Haynes manual. MY initial thought was a vent pipe, but you certainly wouldn't want that inside the truck. IF it is not vented, it seems worthless. Any ideas? /forums/images/graemlins/confused.gif
     
  2. jeffro

    jeffro 1/2 ton status

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    That's part of the emmission controls.
     
  3. chulisohombre

    chulisohombre 1/2 ton status

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    im not sure but i think that someone said that is all linked to the charcoal canister for imissions.
     
  4. homemadesin

    homemadesin 1/2 ton status

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    Hmmmmm. Can I rip it out? I plan on dropping the fuel tank this weekend, so I'll get a closer look.
     
  5. 1HIHUM

    1HIHUM 1/2 ton status

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    I was told it is the vapor seperater for the gas tank. It has to do with emissions, and I think it's supposed to prevent vapor lock. I ran without one on my last blazer without any problems. So my answer would be yeah, you should be able to run without it. But don't throw it away. I looked high and low for one when I didn't have it. They are tough to find.
     

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