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Thread: 2007 4L80E Swap OS problem

  1. #1

    2007 4L80E Swap OS problem

    I have looked all over HP Tuners tune repository can not find a 4L80E operating system T42 OS 24239036 with ecm E38 OS 12614088. Looked in all 07, 08 & 09 Silverado's, Sieras, Suburban's, Vans and even Escalade hoping to find a OS match with 4L80E. I am at a loss, can anyone help. It is for a 07 Silverado swapped in a 6.2L with 4L80E.

  2. #2
    Senior Tuner LSxpwrdZ's Avatar
    Join Date
    Dec 2008
    on the Dyno
    Likely won't find an exact OS match. Just pick a 2007-2008 80E OS and do a write entire with it to your T42 and voila you have a 80E T42.
    James Short -
    Located in Central Kentucky

    2002 Camaro | LSX 427 | TFS245 | Twin S485's | Haltech Elite | GForce T56 | 8.06 @ 181

  3. #3
    Advanced Tuner
    Join Date
    Nov 2006
    This is made just for vehicles that do not have a compatible OS available.
    Tuner at
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