My husband just bought me a 2006 GXP and it is nice. My husband is a car dealer and bought this at auction wrecked with less than 72k miles, so it even be nicer finished :-) I've been looking on the Internet about the GXP's and noticed pictures that there are some that have LCD radio/navigation. I wonder if I could find one, if it would work correctly as in steering wheel buttons and if anymore is needed for navigation to work?