I have an '02 grand prix gtp coupe with bose and onstar. i also have a pioneer deck w/remote that i want to install, however i'd like to keep everything as functional as possible, and having a bunch of dead buttons on my steering wheel doesn't seem too appealing.

What do i need to make my deck work? i'm assuming some sort of adapter is required to work with the bose, and a second adaptor to use the factory wheel buttons with my new deck. What is recommended? what works, what doesn't? thanks