I dont know if you got you answer already, but I have an 05 explorer, and I hid the gps antenna in the dash. Just pop out the trim panel right underneath the windshield (where the blinking red light is) and put the ant there. I just stuck the magnet on the metal right below that trim panel. The manual says to put it on top of the car with an unobstructed view, but I did this about 4 months ago, and I have driven all over CA, NV and across the country to Wisconsin and have not lost signal. Hope this helps.
