You checked the fuel pump relay in the engine compartment fuse / relay box ? The fuse that powers the fuel pump ? ECM B fuse 20amp - engine compartment fuse panel . Is the PCM turning on the fuel pump relay ? Do you know how to test automotive electrical circuits using a DVOM - digital volt ohm meter an a wiring diagram ?
GM Fuel Pump Relay Testing
SOURCE: 1987 GMC sierra , no fuel pump power.
The inline fuel pump fuse on the passenger side firewall is good? Are you jumping it with 12 volts at the test lead or the fuse?
SOURCE: fuel pump fuse located on 1997 gmc sierra
The fuse is actually a Relay Switch and its located in the Fuse Relay Center on the driverside of the engine compartment. The Black Box is labled Fuse Relay Center, the diagram on the cap displays which Relay is the Fuel Pump relay...the Relay switch is usually $8-$15 depending on where you shop
SOURCE: 1998 gmc 2500 sle 5.7 wont stay running
this is in fact the right answer check the oil guage in the truck it should read about 375.
SOURCE: I have a 2000 GMC sierra. I have no power going to
NO POWER GOES FROM RELAY TO PUMP ,HAVE FOUND PROBLEMS WITH FUEL PUMP WIRERING PLUG IN
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