Got a 2000 Silverado, originally had a 4.8L. Doing custom fuel system, removed all the factory fuel lines . Using factory fuel sending unit (except for the pump), 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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