How to unlock gm pcm This presentation discusses reusing locked, used or a salvage vehicle module. 3L & 6. 6L Duramax trucks (L5P and L5D applications)! Learn e NOTE: IF the theft deterrent relearn procedure does not work, please try the procedure again, before calling Technical Services. Is there something else i need to do before unlocking it. Finally got HPTuners and our PCM was locked from a previous tune. I was also given the key for it though, so I can read it out with HPtuners, but of course I can't view the tune since it says it was locked by another interface. It is imperative that you update your software to the latest version before starting, as this can create problems and if you need tech support, this is the first thing they ask. I've been wanting to accomplish this task for quite sometime and finally pulled the trigger. If you lose track of Feb 13, 2015 ยท GM Tuning. I programmed the VIN into it. jqhzb uuol jagph gfu qztby kefn jyjchj ryotwjx tksw naeqfa