Hi, I am new to this site but it seems like there is a wealth of knowledge here. I have searched but have been unable to find my problem discussed here. My friend and I recently installed an Avic f90bt in my 2008 GMC Sierra. Most of the functions work perfectly, however I do have some issues. One is I cannot select settings it is not lit up and won't allow me to select. The bluetooth functions do not work or light up either. Also, it will not allow me to see DVD's, I can hear them but I get an error message saying I can't view while moving even though I am in park and sitting still. Als
