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Thread: Read file and now no com with TCM

  1. #1
    Tuner in Training Dwhip24's Avatar
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    Feb 2011
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    Read file and now no com with TCM

    Hey guys, don't know if you've run into this. 2010 Chevy 5.3, 6-speed. Went to "read" file and once it reached 50%, it turned the lights on and said power reduction. Once it was done, it has a TCM comm error. There's no gear indicator, doesn't shift and stays in what seems to be 3rd gear. Tried reading again, did identical thing.

    Any idea's?

  2. #2
    Advanced Tuner
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    Sep 2006
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    Lake of Como - Italy
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    simply remove the neg battery cable and retry.
    it's pretty common...

    bye!

  3. #3
    Tuner in Training Dwhip24's Avatar
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    Feb 2011
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    That worked, thanks!