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Old 10-20-2020, 07:09 PM   #1
Pyro
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Arrow Which one is the fuel return?

Got a 2000 Silverado, originally a 4.8L. Put a 6.2 in, doing custom fuel system, removed all the factory fuel lines and swapped a Walbro 255 pump in. Used factory fuel sending unit, but didn't pay attention to which line was which when I took it all apart. The main feed line is obvious, being the largest, and I think the return is the other outer line, assuming the middle line is the evap line. Am I right or is the center line the return?

I'm talking about the ports coming right off the fuel sending unit on top of the tank.
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Old 10-21-2020, 08:41 AM   #2
hatzie
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Re: Which one is the fuel return?

You're going to have to look on the bottom of the fuel pump/sender module hat to see what's what.
Return should have a pipe and vapor should have some kind of screened hat... I would think.
Your other option would be a walk in the u-pullit graveyards to get a look.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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