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Thread: Initial flash of T42

  1. #1
    Junior Member
    Join Date
    Jul 2004
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    Default Initial flash of T42

    Replacing the transmission controller on a 2008 Silverado, I uploaded the calibration from my old one and tried to flash the new one but got an error saying the OS was different. Do I have to find a newer calibration to match the new module? I've been looking around but haven't found anything. Thanks for any help or advice.

    EDIT: I think I need a T42 stock tune (2008 Silverado) that uses OS 24252617. If anyone can point me in the direction of one I would appreciate it, thanks.
    Last edited by frodo84; December 26th, 2021 at 07:20 AM. Reason: Found more information

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