03 saturn vue. does not have keyless entry. found another 03 vue with keyless. been told the bcm controls keyless as there is the keyless hardware in bcm that differs from non-keyless cars. so, can i swap bcm's and go? i assume i need to have bcm reprogrammed. not sure why if car has same motor and trans? i think perhaps it is due to security issues? you can remove battery in car and replace it and car works fine. so why is swapping bcm from 1 car to another so complicated? said, tongue in cheek.