+1 on that. Also, there's a wealth of info. available in Search at the top right corner of this Forum. You'll find an adapter by Metra mentioned, and that's what you have to adapt to the new head unit. The adapter will then plug into the car's Mach system. Seriously, go to a shop and let them do it, unless you have the knowledge and patience to do it yourself. If you screw it up you pay twice.