Hey LouRusso.
I have a 13 Sport 1500 that came with the nav installed, I was noticing the same thing with some of my other settings, and I found '<--'-ing out of the page worked vs 'x'-ing out..
On a somewhat similar note, I'm trying to do some research for a buddy, to see how much other people are paying to get the simple Nav update for the 8.4a stereos.. He was quoted around $500, which seems to be expensive since he has the screen already, and it's only software that he's missing. I just finished installing a backup camera via this forum, and the simple software update required to wake up the camera only cost me $57. I don't see how it would cost that much more to wake up the navigation system in the truck..
Can you shed some light on this??
Thanks,
C.J.