I swapped in a 5.3 into a 99 3500 out of a 05 gmc 1500 and kept the 4l80 from the 3500. I can't find a compatible file to segment swap. Can i copy and paste the items or do i have to sement swap? I have tried to segment it and when you look at the two in compare the OS is the same but the swapper is still greyed out. I have went threw the repository and can't find but one or two but they are not compatible. On another note why is the service number not part of any of the calibration details? The pcm has all the factory labels and none of the numbers match anything in the details. I was just wondering about that thinking about going threw a stack i had but hell you really cant unless you just hook up and read. Thanks for the help.

Greggs 99 dulley with LS STOCK DO NOT WRITE!!!!!!!!!.hpt

Service number is 12589463 hardware number is 12589162 YHZS is also on it and 12591723,