Monte Carlos have been known to have trouble with having to pull the radio fuse to flash the PCM. I just had an issue where I almost bricked my PCM because I didn't notice the battery was low. I have two PCMs so one will always be in the car and the other will be for new files then swapped in. Just will make it easier for me personally I guess.

It could always be used to write to other PCMs if anyone wanted to tune PCMs for other peoples cars as well.