Fuse , relay ? What year express ?
2002 Chevy express 3500 changed fuse and relay still no power at fuel pump
Did you test for power an control at the relay? The PCM - engine computer controls that relay .
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SOURCE: fuel pump wiring diagram for 1998 chevy express
Well if theres power going to the relay but not out, then you need a new relay. If theres power in and out of the relay, you might need a new fuel pump. The electric fuel pumps inside the tank are actually lubricated by the fuel as it pumps it, and if it runs dry long enough, it can burn out the pump
SOURCE: Chevy 3500 Express truck. fuel problem?
IF YOU GOT CYLINDER MISFIRE.OR OPEN FUEL INJECTOR.THAT WILL CAUSE THE PCM TO ENRICHEN FUEL MIXTURE.TO ADJUST TO DEAD CYLINDER.WHICH ACT AS A LARGE VACUUM LEAK.THATS WHY YOUR EXHAUST TAIL PIPES HAS A RAW FUEL SMELL AND WHITE SMOKES.
SOURCE: 1999 Chevy express 454 belt diagram.
454 with ac and a.i.r.
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SOURCE: 2004 chevy 3500 express passenger van transmission
if ur replacing it remove front grill disconnect both lines and carefully remove retaining clips from radiator if replacement is original eguipt mount & reconnect --if its a universal follow instructions usually cut off fittings and use clamps and hose to hook up
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