Check you state laws and dealer policy. Maybe you can return our vehicle to the dealer and trade up.poobah said:I'm new here. just got my acadia a few days ago. it's an 08 with dvd entertainment in the rear but no navi in the front. now that i've driven it for a couple of days i really wish i had gotten it. anyone know the part numbers? there are some 07 GM Dvd Navigation units on ebay and they look like the ones for the acadia but i don't know if they will be compatitable.