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Thread: T43 OS 24249179 2500HD 4WD Stock File Needed ASAP

  1. #1
    New Member
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    Sep 2018
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    Default T43 OS 24249179 2500HD 4WD Stock File Needed ASAP

    I need pickup truck stock file for 24249179 OS ASAP. This is a customers vehicle. Thanks

  2. #2
    New Member
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    Sep 2018
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    I read the calibration from the old tehcm and thought I could flash it to the reman unit I installed. The reman unit, however has the previous vehicles calibration still on it and because of an OS mismatch it wont flash. I get a U0100 code in the tcm, but the truck does run. I don't want to road test until I can resolve the issue. Will flashing a compatible OS file to it cure this?

  3. #3
    Senior Member
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    Jun 2008
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    Here Ya go! sorry its really late, but someone else might need it

    T43.ctz
    -John

    1991 RCSB 2WD Sierra LQ4 swap, 220/224 112 cam, Twin VSR 6766 turbos
    4L80e w/shift kit, PY 3600, and 3.73 gears.
    22 PSI and E85, 4300# with driver. 9.7@138, 1.47 sixty
    :drivin:

  4. #4
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    28,403

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    John, Thanks.

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