I am sure you mean PCM (Computer). It needs to be flashed with a program before it will work, they come 'blank' when they are new. you can take it to the dealer or Find somebody in your area that has an unlimited version of LS1 edit. The dealer will just flash a stock program in there, but sombody with EDIT can change settings in your computer for a better program.
I just found this place in a quick search for some place in Indiana:
Exotic performance
that is VERY cheap......