my friend has an extra pcm from the 2005 SS monte. and i think it was already reprogrammed. but i wanted to know if it was possible to use it in my 2007 GT. Granted that i reprogram it. i just wanted two pcms. my regular pcm and a reprgrammed one. just in case the reprogrammed one starts makin the car act up i just slip the old one back on to see if its the parameters that are all screwy.