1. Does the pump actually run (key on engine off) pump should run for 2 seconds and go off and can be heard if you listen at the filler neck with the gas cap removed)
pump not running - Check relay (replace if bad) check wiring/fusese
Pump runs... go on to #2...
2. check the gas guage. is the gauge reading in the normal area it would read in or is it way way off like WAY above full or way below empty? This is a sign the electrical connection at the pump is plugged in backwards and the pump is spinning the wrong way and not picking up the fuel... (This is easy to get plugged in backwards inside the tank when installing the new pump)
3. Check for feed, return and vent lines being installed wrong where they attach to the tank... they can easily be hooked up wrong and fuel is either pumped up in to the return line or pumped in to the fuel tank vent line..
4. check for kinked or crushed fuel lines from tank to engine.
5. check fuel pressure regulator to be sure its not stuck open.
Sounds like the pump is not working.disconnect the fuel filter,and see if fuel is under pressure,if not something is wrong with the pump install,or you have installed a 13psi not 45psi vortec fuel pump
Check the fuel pump relay. A bad relay can keep the pump from working..
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