Results 1 to 4 of 4

Thread: TCM Requesting Access Failed

  1. #1
    Tuner in Training
    Join Date
    Oct 2012
    Posts
    24

    TCM Requesting Access Failed

    I need help I have trouble reading the TCM for a GMC Sierra 2012 Pickup annex the error message
    Attached Images Attached Images

  2. #2
    Tuner in Training
    Join Date
    Oct 2007
    Posts
    46
    Quote Originally Posted by XTR PRF CRS View Post
    I need help I have trouble reading the TCM for a GMC Sierra 2012 Pickup annex the error message
    do you have the latest beta? if not you might need it to read this tcm, but if you do, just pull the fuse for the tcm for a few secs, this will reset the tcm and that should take care of it

  3. #3
    More than likely its Tuner locked

  4. #4
    Tuner in Training
    Join Date
    Oct 2012
    Posts
    24
    I have the lastest beta already do the fuse part and stiil cant read the tcm for more information this pick up was bringing previously a superchips tuner which already remove....might have been wrong to remove the tuner and this could continue installed and this could cause this fault?