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Thread: 4L80E Segment Swap for 2004 5.7L LS1 GTO Applications.....files included, need tested

  1. #1
    Fuel Injected!
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    4L80E Segment Swap for 2004 5.7L LS1 GTO Applications.....files included, need tested

    I did a segment swap from a 2004 truck O/S 12587603 into a 2004 GTO O/S 12587604. The 'Trans' and 'Trans Diag' segments were identical length in both calibrations. I did the swap using a hex editor in binary. I programmed a PCM and read a file out in a few different formats if anyone can test that might have a ls1 4l80e combo.

    zip file contains

    binary
    tuner cat obd2
    efi live v8
    hp tuners

    all from the same PCM. This is untested, but should work. The rest of the GTO file is STOCK.

  2. #2
    Super Moderator dave w's Avatar
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    I recently worked on a 2004 GTO with manual. I don't have a LS1 / 4L80E combination. I downloaded the .zip posted. I did a compare with a LS1 / 4L60E, and from what see with TunerCats, it looks good.

    dave w

  3. #3
    Fuel Injected!
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    Here is a confirmed working one if that helps.

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