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Thread: TCM Security Access Denied

  1. #1
    Potential Tuner
    Join Date
    Sep 2008
    Posts
    6

    TCM Security Access Denied

    Hi,

    I was trying to tune my Brother in Law's 2010 Silverado, but when I was trying to Read it, it shows this window


    What can I do?

    Thanks
    Sergio

  2. #2
    Potential Tuner
    Join Date
    Mar 2010
    Posts
    6
    this is the same issue i am having with my truck a 2010 silverado. one guy said he had this issue and removing the DIC fuse allowed him to read and write once the fuse was removed. that did not work for me. i had the dealer flash my truck and they had no issues accessing it but i still cant. if you figure anything out please keep my updated. thanks!!

  3. #3
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
    Join Date
    Jun 2004
    Location
    Hailing from Parts Unknown
    Posts
    28,247
    email support.
    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 snowvette's Avatar
    Join Date
    Oct 2008
    Location
    Rockford Il.
    Posts
    135
    I'm having this same issue. I had a set of locked ecm and tcm that I sent back to the tuner and had them unlocked. I got them back and I can read ecm, but gives me the above error when it goes to read tcm. I called them and they said they didn't and couldn't lock tcm.
    2007 Chevy Trailblazer SS AWD with boltons GP tuned
    2012 Chevy Cruze A6 LTZ RS Vermount Stade 0 tuned