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Fuel Pump

This is a discussion on Fuel Pump within the GM Trucks forums, part of the Vehicle Specific category; Not sure if right section, but I figured there are enought mechanics on here to point me in right direction. ...

  1. #1
    Junior Member oharam's Avatar
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    1999 Z-28 LS1

    Fuel Pump

    Not sure if right section, but I figured there are enought mechanics on here to point me in right direction.

    I have a 1999 Suburban that needs the fuel pump replaced. Now I have read on other sites, and google searches that there are several different ways to replace it, however I need the easiest and fastest way possible. Is dropping the tank and doing it, the fastest, or is cutting a port in the floorboard (and replacing metal when done) the fastest. I have the tools to do either way, but need to get it done in the fastest means possible (HOA guidelines dont like people working on vehicles all day long), and I would rather do it myself and not pay someone else to do it.

    Thanks for your help!

    Mike
    1999 Camaro Z-28 LS1 M6
    Cam, Heads, Exhaust

  2. #2
    Your dealership guy konigandy6's Avatar
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    The correct way to do it is to drop the tank from the bottom. It is time consuming, but not that difficult.

    2008 Z06 - Velocity Yellow - OEM

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    Member Frozen WS6's Avatar
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    2001 WS6, 1998 TA

    Just make sure your low on gas so it doesn't weigh as much then drop it. I have a 2500 long bed and I change mine in about 4 hours with hand tools dropping the bumper and pulling the bed back by myself.
    2001 WS6 TA Red. Stock, 6 spd, LS7 clutch, Catback, Harris Nitrous Kit, Custom Painted Flames, Wolfe 6 point rollbar.
    1998 TA Black. 408, t350, nitro daves plate w/dedicated fuel cell, mini tubbed, 30" dr's. 9.75 @136mph on a small shot. Fastest LSX in Alaska, Pump gas, never trailered street car.
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    Junior Member oharam's Avatar
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    Thanks for the input! Now I just need to get to florida where it is sitting and replace it!

  5. #5
    Junior Member oharam's Avatar
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    Does anyone have a wiring diagram that goes from the truck harness (4 pin square) to the new connector (4 pin flat)? Thats all I am needing to get the tank back up into the truck.

    Thanks!

    Mike

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    Member Frozen WS6's Avatar
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    RED, BLACK
    2001 WS6, 1998 TA

    It took me a little to find these instructions in my file. But they should help, they came with my new GM fuel pump I bought.

    trk-fuel-pump-wiring-002.jpgtrk-fuel-pump-wiring-003.jpgtrk-fuel-pump-wiring-001.jpg

  7. #7
    Junior Member oharam's Avatar
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    Thanks for the info! I did get it back up and running, and found that the piece that has the smaller connector plugged into it was cracked at the nipple that goes into the top of the pump. Only took about an hour total, using very basic tools (2 GM car jacks, and misc socket set).

  8. #8
    Member Frozen WS6's Avatar
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    Cool. Easy fixes are always good.

  9. #9
    Junior Member oharam's Avatar
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    You got that right! Easy fixes that saved me $500 from the garage price!

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