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Thread: 2008 duramax cant access ecm

  1. #1
    Tuner in Training
    Join Date
    Sep 2010
    Posts
    14

    2008 duramax cant access ecm

    When trying to pull the stock file off the ECM...it gives "tcm access denied" and then times out?????..Ive tried everything I can think of....any ideas?...thanks in advance...Jim

  2. #2
    uncheck the "high speed" box before you try to do the read
    2006 LBZ Duramax
    5" Magnaflow turbo-back
    EGR blocked
    HP Tuned by yours truly

  3. #3
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
    Join Date
    Jun 2004
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    Hailing from Parts Unknown
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    28,247
    I recommend contacting support with a vcm suite infolog.

    access denied errors are VERY rarely fixed by high/low speed reading mode adjustments.
    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
    If support offers you a new beta to correct your problem, be advised it will not contain the DPF features that the older versions have.
    2006 LBZ Duramax
    5" Magnaflow turbo-back
    EGR blocked
    HP Tuned by yours truly