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Thread: Error: $0537

  1. #1
    New Member
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    Nov 2010
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    Default Error: $0537

    trying to read tune off 99+ LS1 PCM and get an error $0537. Can anyone help? new to all this.
    (yes I have latest software. I've reinstalled it too.)
    Last edited by bobwagon; November 23rd, 2010 at 10:54 AM.

  2. #2
    EFILive Developer Site Admin Blacky's Avatar
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    Mar 2003
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    9,490

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    $0537 Controller is locked with a custom key. An attempt was made to read or program a controller that cannot be unlocked using the standard GM keys. If you know the key that was used to lock the controller, please use the unlock option in the EFILive software to unlock the controller before attempting to read or re-flash the controller again.

    Has the controller been tuned before? If so you'll need to contact whoever tuned it to get them to unlock it.
    Sometimes GM's programming system can mess up the lock on the PCM. If the controller has been reprogrammed by a dealer you may be able to unlock it using the key $FFFF in the V7.5 software.

    Regards
    Paul
    Before asking for help, please read this.

  3. #3
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    Thanks for that. Yeah it has already been tuned. Bugger.

  4. #4
    Lifetime Member
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    Can you ask the programmer what key they used?
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  5. #5
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    I have the same problem I have the programmer they used but am not sure what the key is. Do I still need the key if I have the original programmer that turned my truck???

  6. #6
    Junior Member
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    Nov 2011
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    You are going to need the key to get in. You will have to hope the programmer is willing to give the key out. Given that they locked it I don't like your chances.

  7. #7
    New Member
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    Mar 2014
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    So if I can't get the key what are my choices

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