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Thread: Need a stock 2010 Express van T43 OS 24254909

  1. #1
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    Default Need a stock 2010 Express van T43 OS 24254909

    I need a .ctz file for a T43 6L90 trans from a 2010 Chevy/ GM Express/ Savana van with a 6.6 Duramax, engine OS is 12628594.

    Trans OS: 24254909
    Trans Cal ID: 24255732
    Trans System ID: 24252157

    Any help is greatly appreciated.
    Last edited by cynight; August 20th, 2019 at 01:27 PM.

  2. #2
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    I had the Chevy dealer flash my transmission using my bench flash harness. It will work great for my LMM/ 6L90 swap since the 2010 van was the only vehicle that came with both. An Allison trans is too large for the car it's going in and the 6L90 can be built to handle decent power.

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