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Thread: Problem Reading VCM!!!

  1. #1
    Tuner in Training
    Join Date
    Jul 2008
    Posts
    21

    Problem Reading VCM!!!

    Hi guys,

    While attempting to help a customer with his tune today, I kept receiving "timed out" error messages half way through the VCM read. I asked if this truck was equipped with a downloader tune, and the customer said it could be, but not sure I just bought it this way. My question is if he purchased this truck and a tune was still in there from the previous owner, is the error message I'm getting normal, as I assume it would be locked? thanks!

  2. #2
    Advanced Tuner
    Join Date
    Dec 2005
    Posts
    214
    Try pulling the radio fuse,IPC/DIC fuse and onstar if equipped
    if it is locked it will fail

  3. #3
    Tuner
    Join Date
    Jun 2006
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    eastexas
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    104
    what year is the truck? you mite have to disable high speed writeing.

  4. #4
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
    Join Date
    Jun 2004
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    Yeah if its 01-05 you'll probably need to disable high speed reading.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  5. #5
    Tuner in Training
    Join Date
    Jul 2008
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    21
    The truck was a 2003, so disabling the high speed worked. Thanks for the help!

  6. #6
    Potential Tuner
    Join Date
    Feb 2009
    Posts
    1

    i have the same problem

    i have a customer with a 03 gmc diesel. it always times out

  7. #7
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
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    disable high speed reading.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  8. #8
    Tuner
    Join Date
    Dec 2006
    Location
    Washington State
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    96
    Quote Originally Posted by Bill@HPTuners View Post
    disable high speed reading.
    X10

    23 minutes later you are good to go
    Ellis
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