i have this Navigation system in my 2007 Hummer H2 and i guess its the luxury system...My question is

When you play the navigation Dvd ( which i dont have yet ) Does the radio still work....

Whenever you want to use the navigation system..do you always have to put the Cd in..or is there a little hard drive in there that stores the Navigation Info...

Just wondering what i have before thinking of buying a new system..

 

AM/FM Radio, and or XM Radio will play with the Nav active, but the CD must be inserted while using the factory Nav system.

 

thanks man....thats the answer i was looking for....thanks