Well using PCM Hammer I pulled the OS ID off my PCM and it appears to be OS ID 12613248

I've taken a gander around and haven't really been able to find any associated to this PCM, but maybe someone has one they would be willing to share?

The truck it came from was a 2007 Chevrolet Silverado Classic 2500HD with the 6.0 LQ4 with a 4l80e transmission and the truck is 4x4.

I've also heard of people perhaps switching to the 7603 OS but not sure if I am willing to go that route quite yet.