To Answer BigBassLaredo question on how to add Google Maps to the MyLink Screen - Unfortunately you can't add any apps to the Mylink Screen. Only Chevrolet can make apps to add them to the MyLink screen and they a very slow in doing this I might add. However, you can use your Google Maps on your IPhone and make the sound use the speaker system if you follow the instructions in this link.
http://www.gm-trucks.com/forums/topic/153867-mylink-and-iphone-with-google-maps- not-working/
I have talked with the support staff with MyLink and they believe that there is NOTHING wrong with their product even though you prove yourself to them. For Example on numerous accounts after starting up my 2014 Truck the Bluetooth connection doesn't fully connect with the MYLInk System and how you will know this is by the "Voice Command" button will no longer work until you shut your vehicle down and restart it. They blame this on the IPhone not their system.
In fact, their pat answer to all of my questions about their system come back to one statement they always tell me. Every Iphone works differently so it is very hard for our programming staff to make all IPhone work correctly. really that is your answer. Do they thing that I am stupid? I beleive even thou Apple does have different manufacture create different parts to the IPhone there is only one OS manufacture and either you are using IOS 6 or IOS 7. Not like an Android phone where every manufacture tweaks the Google OS.
I really think that Chevrolet should be assamed that in $30K and up they put in such a lame system that could be so much better with a little bit better programming. Maybe they used the same programmers that created that website everyone loves HealthCare.org.