I have had the truck almost a year and still learning how things work. Seems like every time I get into a new menu I stumble on a new feature. This morning I found out the nav has a screen that shows your current latitude and longitude and elevation. Very cool. The elevation is within 6 feet of actual. Maybe it measures to the top of the truck. It also seems to show the current satellites and signal strength. I wonder what else the 8.4 can do that I am unaware of.