Help with radio replacement

Crutchfield's website is set up so that you can input your car's brand, year and model and it'll give you a couple of ways to go on adapters (Maestro and others) to use for your head unit (you may have to input that too, if it's still in their database). If you buy stuff from them, they have knowledgeable people you can contact by phone or email for assistance. You will probably get the most specific info from them on what to get.