2008 tahoe Install

[js09242011]

I just installed the costar on my 08 Tahoe..after install I lost my clock on my navigation and it does not allow me to set it. Also the Bluetooth connects to my phone ( iPhone 5) , but it does not go thru the speakers on my truck. It's connects on the truck because I can see it connect on my dashboard. Are there any buttons I need to press on my mirror to activate it? When I first set it up I ran a test call before I put everything back together and it worked fine.