navigation system

[jmully44]

I own a 2008 Yukon . The navigation system works but whenever you turn the car off, the nav resets itself to another search zone. I live in the Davenport, IA Area. When I shut the car off, and come back a few minutes later and turn it on, the nav has Washington DC as the search area, it has deleted all nav history as well as all saved address book entries.

 

[chevyron64]

I have the same problem with my 08 Denali. have asked everywhere, but no answers found yet. Also, during DST I always have to add 1 hour to the clock. Anyone have a solution?