Just for everyones information,

You can make any pcm into anything you want via the correct software.

As long as the hardware is the same or close in years.

The list is as follows for the most part,

ANY
99-02 v8 gm Gas computer will interchange with anything,
Gm used the same computer for the v6 4.3 liter trucks from 01 to 05 as the v8 computers of that same year set..

03-05 v8 computers will all interchange....

 

that is true but a pcm tuned for the 6.0 and 80e will not run a 5.3 and a 60e without a tune.