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Old 09-30-2016, 12:42 PM   #3
Boog
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Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,700
Re: Seeking education on fuel pumps, gas caps, vapor canister

The larger nipple is the inlet line. The smaller one is the return line to the tank. The tank will vent through a line that runs up in the right rear cab corner then down and to the charcoal canister under the hood Iirc.
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Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
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91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.

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