In my 1990 GMC 1500 pickup truck the fuel pump still runs even after we shut the truck off.Does anyone know why this could be happening? Any educated guesses would be great.
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05-03-2013, 04:08 AM #1Senior Member
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why does my 1990 GMC 1500 pickup fuel pump still run after truck is shut off?
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05-04-2013, 10:34 PM #2Junior Member
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The relay may be bad by continued running or the ignition switch is staying on.
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05-05-2013, 04:08 AM #3Junior Member
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bad / sticking relay.
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05-11-2013, 04:08 AM #4Senior Member
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The switch could be sticking, that would make it keep pumping fuel.
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