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Pyro · 10-20-2020, 07:09 PM

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.

10-20-2020, 07:09 PM	#1
Pyro Registered User Join Date: Jul 2004 Location: New Boston, MI Posts: 71	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.