Hey thanks for the add. I just got done changing the OS on a 12576016 pcm to the 12587603. Flashed it with a bin for a 2004 2500hd 6.0 and slapped in my 2005 Chevy 2500hd and got it running with some help on the TunerPro Support & Tuning and the PCM Hammer Facebook Groups. Now I’m hoping to learn how to make changes needed to free up some power from the torque management. Thanks, Brandon.
