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Old 12-22-2018, 11:34 AM   #5
hugger6933
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Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,281
Re: 68 GMC Sierra fuel gage/electric

The sender with two ports is for a 72 if I remember correctly that extra would go the the purge canister witch you don't have . BUT if you have the right gas cap for your year it is vented and then if that indeed is the case you can plug that port with a vac cap no problem. Jim
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