I keep writing this post but don't see it in the thread. How do you update the Nav in a 2012 Tahoe. I have the disc but need help with instructions on installing it.

 

Tap the NAV button, once you see the full screen displayed, hit the MENU button.
Then tap on "Map Database Information"
Then tap on "Change"


The screen should tilt and the disc pop out. Insert your new disc and let it load.


I had to figure this out for my '11 Burb.


Enjoy