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  1. #1
    Jen
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    Senior Member Jen's Avatar
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    why does my 1990 GMC 1500 pickup fuel pump still run after truck is shut off?

    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.

  2. #2
    Junior Member tA+t's Avatar
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    The relay may be bad by continued running or the ignition switch is staying on.

  3. #3
    Junior Member HeMeCspeed's Avatar
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    bad / sticking relay.

  4. #4
    Senior Member Jack's Avatar
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    The switch could be sticking, that would make it keep pumping fuel.


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