1998 gmc,5.0, vortec.Turns over but does'nt start.No noise like before,nothing.Its the fuelpump.I know some vehicles have a reset button,or a shut off for accidents,so the don't keep pumping gas,is there one on this truck and if so,where is it located.I know some are behind kicker panel.Is there a test to make sure its fuelpump.And do you have to drop tank to replace.Thanks Bill
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You'll have to figure out if it is a fuel or ignition problem. Is the check engine light on ? Have you checked for trouble codes ? It could be a relay, the ignition module, coil, or a list of other things. Even the fuel pump. If this is a vortec V6 it takes at least 60psi to cover the injectors.
sounds like your fuel pump, should be 50-55psi fuel pressure, if you don't have a gage,you could check the schrader valve on the rail with screw driver,watch out if it's pressurized it could squirt in your eye's if it shoot's out really strong,chances are it's working, but if it just does little squirt or dribble, then check it out electrically, fuse,relay etc:before you drop the tank, or like some people do take box bolts out and lift box back and it's easier to change pump then.good luck and any other questions feel free to ask me
With ignition key on run, use test light to verify you have positive & ground to fuelpump. No power (positive) check fuelpump fuse. No ground check fuelpump relay. If both positive & ground fuelpump needs to be replaced.