please help to recover PCM LS 1 GM 2001 GMC 5.3L Serv. NO 12200411 , while writing calibration changes with PCM Hammer something went wrong and now PCM don't respont and I cant recover , please help me who can? what steps need to be done to recover this PCM ? I have Stock file . Operation system 12202088
Wrong forum dude. PCMHacking.net would be the forum for that.
https://www.youtube.com/watch?v=lvH2A-C_grI