On my 2004 Grand Prix, I currently only have the 3 button information center. If I were to purchase the 5 button information center, how hard would it be to install? Would it be easy as plug-n-play or does it need new wiring and sensors? Thanks!

That's what i'd like to know!!!!

if it does then you will have to get the unit plus the new panel that is for the five button and that will be expensive. but i don't knoe if it will or not. i can't even find anywhere online where you could get the five button DIC (driver information center)