I have the Nav Radio on order from JPcustoms to upgrade in my Acadia. I am getting the One That will Play Dvd's. They do not list the radio for the Acadia on there website since it is so new. The nav units are made by Denso not by Delphi. The guy I talked to on the phone said that I will just have to change radios and install the antenna. He is not sure if I will need to have the computer programmed after the install or not, mine is the first one they have ever ordered one for.