My 97 2500 gmc with a 350 in it the feul pump went bad I changed it and the truck fires but won't start help please

Asked by Jul 24, 2015 at 04:54 AM about the 1997 GMC Sierra 2500 2 Dr C2500 SL Extended Cab LB HD

Question type: Maintenance & Repair

I tried to bleed the system but that did
not help I am getting spark but I don't
think the fuel is getting enough pressure

7 Answers


Did you also change the fuel filter and the fuel pump relay?

I did not change the relay because the new pump is working I did change the filter though I have good pressure coming up to the intake manifold

Is it possible that there could be air trapped in the line ?


The air should bleed out rather quickly on this system, usually cycling the key a few times will do it, you might want to check the fuel pressure to see if the new pump is up to specs, it is not uncommon that it may have the wrong pump for your engine. I have had this happen to me a number times even when replacing the complete unit the pressures are wrong.

1 of 1 people found this helpful.

I will check that and see I hope it is right but with my luck I will have to go through and pull the tank all over again Lol thank you for your advise I will let you know what I find out


You may want to consider replacing the pressure regulator also just because of the age of the unit. On my Tahoe that I had it was only 30 days after I had replaced the fuel pump that the regulator went bye bye, just a thought.

1 of 1 people found this helpful.

Not a bad idea

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