the PCM was already installed in the car when i bought it and the only thing i know about it is that it has been reprogrammed and the label says "REMANUFACTURED BY GM CORP. SERVICE NO.16236757"
As in other mods i believe its got a 180F thermostat, a cold air intake and a 3.4" SC Pulley.
I'll be getting rid of the cold air intake and will be putting on a intercooler to help the SC stay cold as on the PCM i'm not sure yet but i think i'm getting rid of it too.