Quote Originally Posted by GeoNV View Post
Here's the stock tune file I downloaded from my 2004 GMC Sierra 1500 4x4 with the LM7 5.3 and 4l60E with OS 12587603.
do you happen to have the xdf file to this one. my computer is the 12585950 and their are no xdf i can find to work. your bin has same motor and transmission going to try using it if i can find the matching xdf file