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Thread: TCM Unsupported ??? Now I can't Read/Write?

  1. #1
    Tuner in Training MattKatz's Avatar
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    TCM Unsupported ??? Now I can't Read/Write?

    Trying to read file for initial tune and I get "TCM Unsupported".
    This is an '06 Trailblazer SS E40 PCM with an E43 TCM.
    Here's a quick back story.
    Truck blew motor, dealer replaced, said tune wasn't stock, also replaced PCM, did not replace TCM. Trucks fine. Fast forward to now...I do a set of modifications to truck, go to license truck by pulling stock files and get this error, how do I fix it or what do I look for.

    I'm assuming this TCM was also modified but wasn't replaced when the dealer replaced the PCM and now I cant read it. I have a stock 2006 TCM file from another TBSS, can I flash just the TCM to get it back like it should be or??

    I'm a little lost on this one, as this trucks out of commission until we come up with a solution.
    Help me out here guys.
    Thanks in advance.
    Nations Fastest AWD Trailblazer SS

  2. #2
    Tuner in Training MattKatz's Avatar
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    No one huh?

    There's got to be a way to flash this TCM to work. I verified it is the TCM causing the problem by installing a good one and it remedied the issue.
    Nations Fastest AWD Trailblazer SS

  3. #3
    HP Tuners Support
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    Bill@HPTuners's Avatar
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    If the TCM was tunerlocked there is no way to flash over it. Thats why the dealer couldn't even fix the pcm.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  4. #4
    Tuner in Training MattKatz's Avatar
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    Dealer never tried to, I'm gonna try to get a buddy at the dealer to try to flash it back to stock tomorrow, but as you said, it doesn't look good.

    I hate tuners who lock, it really screws people down the road.
    Nations Fastest AWD Trailblazer SS