Allen...would you look at my file and look at the OS ID number.....This is the wrong OS for my truck and is as well why i cant use RTT in HPtuners.Ive been struggling with the tune on my truck for 2 yrs thinking i just cant tune it.Can you help me out here or do i need to just burn another 100.00 in credits to get the correct OS. BTW this is the pcm you sent me when i wanted my tune unlocked....