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can I use a 99 fuel tank in my 98 formula

This is a discussion on can I use a 99 fuel tank in my 98 formula within the General Help forums, part of the LSx Technical Help Section category; Hi fellow members Where I work we got in a 99 formula that was wreck that we strip.What I want ...

  1. #1
    crazyforgms crazyforgms's Avatar
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    98 formula

    can I use a 99 fuel tank in my 98 formula

    Hi fellow members
    Where I work we got in a 99 formula that was wreck that we strip.What I want to know is will the plastic tank & fuel pump work in my 98 formula.My pump is kicking the bucket so I Want to upgrade to the bigger plastic tank instead of my steel tank.

    Thank you
    crazyforgms

  2. #2
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    I'd have to dig around because for some reason I have it in my head that you can't use the pump but I might be wrong on that. Seems like for some reason 98's can't use the 99+ pump but I'm not sure about that. I do know that if you swap tanks you will want to swap pumps because the 99+ tanks don't have baffles in them and use a bucket on the pump where as the 98's don't use the bucket on the pump because they have baffles in them. Let me dig around and think about it for a bit if someone else doesn't chime in, I could be totally wrong on the pump. Maybe I'm thinking that if you swap tanks you have to swap pumps also.

  3. #3
    crazyforgms crazyforgms's Avatar
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    thank for the info orion.I think there is something diffrent between the two pumps. the 99+ have a sensor the 98 do not have.That why I am asking .I dont care if I have to get a new pump but will the 98 pump assumbley work with the 99 tank.
    Happy Motoring

    1969 chevelle Lemans Blue 350 v8
    1994 Roadmonster garnet red LT1
    1998 formula Ls1

  4. #4
    crazyforgms crazyforgms's Avatar
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    ps sorry for the spelling did not have my coffee this morning

    lol

  5. #5
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    no, the 98 pump will not work in a 99+ tank. For one thing they mount differently, the 98's bolt on and the 99's twist on. There's also the bucket and venturi feed system on the 99+ that the 98 doesn't have. I did some digging around and never really found any concrete info if swapping the tank and pump from a 99 back to a 98 would work. I think possibly the return lines are different on them.

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