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98 chevy c2500 new fuel pump. Problems

This is a discussion on 98 chevy c2500 new fuel pump. Problems within the Technical / Maintenance forums, part of the General Discussion category; Hi I have a 98 chevy C2500 p/u with a new fuel pump and new Fuel pump relay installed. The ...

  1. #1
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    98 chevy c2500 new fuel pump. Problems


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    Hi I have a 98 chevy C2500 p/u with a new fuel pump and new
    Fuel pump relay installed. The truck turns but I can't hear the sound of the fuel pump motor. Wondering what could
    Be the problem.. If anyone can give me
    An idea of Any possible problems that would
    Be great.

  2. #2
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    Re: 98 chevy c2500 new fuel pump. Problems

    Assuming it wont start? I cant hear my new pump , but it runs... Did you attach the ground to the frame rail?
    Do you have a fuel pressur gauge on the rail to read pressure if any..Must have 58 to 62 psi to run anything below that it will not...

  3. #3
    GMC RULZZ NEUMANNZZ's Avatar
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    Re: 98 chevy c2500 new fuel pump. Problems

    did you update the fuel pump module with the new style harness?
    plus is 12vdc getting to the pump?
    Last edited by NEUMANNZZ; 01-12-2012 at 08:53 AM.
    O2 GMC RCSB 4.8L V8 AUTO 3.73's
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    Re: 98 chevy c2500 new fuel pump. Problems

    Yes the new harness was replaced. For the new fuel pump. What is the 12VDC? Sorry for all these questions.
    Last edited by gridlock; 01-12-2012 at 09:22 AM.

  5. #5
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    Re: 98 chevy c2500 new fuel pump. Problems

    are you getting power to the pump connector is what he's asking.

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    Re: 98 chevy c2500 new fuel pump. Problems

    No I'm not getting power to the fuel pump assembly. This is the second pump assembly that I put in I thought the first one had defects for the same reason so I exchanged it for another one.

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    Re: 98 chevy c2500 new fuel pump. Problems

    If no power to the pump its not the pump...
    Does the truck have an after market alarm?
    Check the Fuel pump fuse.
    Is there powere @ the relay terminal?

  8. #8
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    Re: 98 chevy c2500 new fuel pump. Problems

    There is no after market alarm. I will check if there is current.

  9. #9
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    Re: 98 chevy c2500 new fuel pump. Problems

    Fixed!!:) it was a small fuse next to the fuel pump relay ECM-B.. Thank you everyone for all the help!!:)

 

 

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