Hey..Just got this car might as well be a 2016. Theres a nav button built in. Best I can find in the truck theres a slot for a dvd? Best can tell theres not one. What ya have to do to use the built in nav? Buy some unit put in the truck? Love this car its in mint condition. One other for now. The side mirrors guess are heated with memory. Have turn signals. Ya know where can buy both sides don't cost $400 bucks?