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08-08-2018, 03:34 PM
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Senior Member
 
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,910
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return fuel line questions
getting ready to plumb the lines.
I have a 5.3 from a 2003 Yukon xl 2wd dbw with the return fuel system. I know the main line is 3/8 an6 but the return is smaller. 5/16 right? is there a 5/16 connection at the rail to a 3/8 fuel line or do I need to get 5/16 return line? (PTFE all of course) also what micron fuel filter should I get. just street, no mods to the engine just yet
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