Thank You! I thought that was how it worked. For the Bluetooth navigation, does it use my google maps (HTC INCREDIBLE) and announce them over the car stereo?
Do you have FM transmitter on your GPS? If so, you can set up your GPS to announce over a FM channel. If your GPS has bluetooth it is probably there so you can answer your cell phone and dial out on it. You don't need that part because your Terrain has that feature built in.
I keep my GPS's (Garmin and TomTom) unlinked from vehicles so I don't lose functionality of my entertainment system. If you link them to FM you have to keep it there to hear announcements from GPS.