You cannot swap bcm from car to car, all modules must be programmed to the car and as far as i know they can't be reprogrammed to second car. Never tore bcm down and only had limited time using tech 1 never got to play with tech 2 at dealer. In familiar with software and interfaces. Supposedly vxdiag has a emulator that uses gm software. You can get them off Amazon. They will flash OEM pcm but don't let you tune as far as I know.