1997 GMC C2500 It seems the fuel pump failed, I sen t it to

1997 GMC C2500
40,000 MILES • V8 • 4WD • AUTOMATIC
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DZOSEUSA
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I have a 1997 GMS Sierra 4wd pkup, it just would not start, it cranks well, plenty of good fuel, but will not catch. The shop said fuel pump. They have replaced it twice, and it runs for a few minutes then stops. they are still working on it. It's been a week. thanks
Sep 24, 2008 at 7:10 AM
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RASMATAZ
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Tell them to start the vehicle when its idling remove the fuel pump relay and see what happens-if it dies out to inspect and test the fuel pump/oil pressure sending unit. This is the one the powers the fuel pump as soon as the engine starts.
Sep 24, 2008 at 4:54 PM
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DZOSEUSA
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When checking the oils pressure\fuel pump sensor, what exactly would they look for? To see thatit initially powers up and starts the fuel pump process?
Sep 24, 2008 at 6:15 PM
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RASMATAZ
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If it dies out when the fuel pump relay is removed you either have an oil pressure problem or the fuel pump/oil pressure sending unit is defective-

The oil pressure closes the switch to power the fuel pump
Sep 24, 2008 at 6:20 PM
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