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Thread: 4L80 Segment swap os 12593359

  1. #1
    Potential Tuner
    Join Date
    Mar 2020
    Vacaville Ca

    4L80 Segment swap os 12593359

    Anybody have a segment swap for 4L80 in operating system 12593359. Tried to manually input the transmission settings and still wont shift. Getting close to burning this truck down. Any help is really appreciated.

    Thanks, Roy

    Here's the tune
    Attached Files Attached Files

  2. #2
    Advanced Tuner
    Join Date
    May 2006
    Seattle, WA
    I googled and looked, don't see a truck OS that matches that. Probably easier to grab a 02 OS of 12212156 and use that, the file posted is a Vette one so use that and segment swap from a 02 Silverado 2500 6L. Downside is you have to relicense the file if you don't have unlimited for that year unlocked.
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