I think the pcm was JV2??? I had an 01 job 2 and my mods were K/N filter and flowmaster DF50 exhaust. It has a 87 fuel economy, power, and a 93 power program.
I do not know all the details on these things, but it says something like 4 more loads until locked? Maybe Torrie can explain more.
I did flash the truck back to stock. I will make you a good deal, contact torrie and see what he will charge you to change it (if needed) for your truck. I can send him my vin so he can get the info from my st if need be.