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G body ls swap

This is a discussion on G body ls swap within the General Help forums, part of the LSx Technical Help Section category; I have a question for my gbody guys with the ls swap done. Can I just buy a grand national ...

  1. #1

    G body ls swap

    I have a question for my gbody guys with the ls swap done. Can I just buy a grand national sending unit and use my malibu gas tank or do I need to buy both sending unit & gas tank

  2. #2
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    pajeff02's Avatar
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    Feb 2009
    Mansfield, PA

    Black & Blue
    '02 WS.6 / '07 Suburban

    The G-body and LS1 fueling systems are completely different as far as pressure is concerned. Your best bet to retain the stock style tank these days is probably to run the Aeromotive drop in pump assembly that will seal to a stock tank (after some work). Even though I own a Turbo G-body, I cannot remember if it has a return or returnless style pump setup.

  3. #3
    I'm not to sure if I can use a malibu tank because it's not set up for a efi pump. It would be cheaper if I could you my old tank and drop a grand national or a 4.3l monte carlo sending unit with a walbro 255 pump

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