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86 K2500 Diesel suburban Fuel line diameter

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Geoffr, Jul 23, 2010.

  1. Geoffr

    Geoffr New Member

    partners suburban is down again :(

    the fuel tank selector assembly cracked so she had it bypassed. now there's lots of air getting into the system somewhere. I suspect that the person who did it used fuel line that is too darn large and it isn't sealing properly.

    so, what diameter is the metal line that the rubber ones go over and clamp down? or... what inner diameter do I need to get since I think I'm just going to replace the rubber with tygon?
  2. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    3/8" supply.

    1/4" return
  3. Geoffr

    Geoffr New Member

    thank you for the info!

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