Results 1 to 2 of 2

Thread: Flashing over locked HP tune?

  1. #1
    Junior Member
    Join Date
    Jun 2013
    Posts
    18

    Default Flashing over locked HP tune?

    Is it possible to do a complete flash over a locked HP tune? I have an acquaintance whose son blew his motor up, and a condition of dad helping him get a new motor was that he puts the factory tune back on, since they are 90% sure that the HP tune is what caused the problems. They took it to GM, and their tool can't access anything. Truck is an '05 Avalanche with a 5.3L. I can find a factory tune to flash, just need to be able to flash it back on. If so, does transmission shift pattern change based on rear gearing, or would only speedo have to be rercalibrated? I don't know LS systems at all. Thanks guys.

  2. #2
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    If the tune (actually the PCM) is locked then no you can't just flash over it, you need to have the PCM unlocked first which is why GM's systems couldn't flash it either. Once that is done then you would be able to flash over any program you need.
    I no longer monitor the forum, please either post your question or create a support ticket.

Similar Threads

  1. Is this tune locked?
    By BLU BYU in forum Gen IV V8 Specific
    Replies: 2
    Last Post: March 4th, 2016, 11:43 AM
  2. Locked tune...
    By ARC in forum Gen IV V8 Specific
    Replies: 6
    Last Post: August 21st, 2013, 03:58 AM
  3. Installing Locked Tune With V2
    By Kiwi Ed in forum FlashScan V2
    Replies: 6
    Last Post: August 12th, 2012, 08:06 PM
  4. can't download my tune, could it be locked?
    By alwaysinboost in forum FlashScan V2
    Replies: 6
    Last Post: May 1st, 2009, 03:10 PM
  5. Tune locked, can't read?
    By eboggs_jkvl in forum FlashScan V2
    Replies: 4
    Last Post: January 31st, 2007, 03:52 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •