I put an XM radio in my 1996 Caprice. I ran the antenna up through the defroster vent in the center of the dash. I don't get very good reception, the XM signal comes and goes. I have the same setup in my Impala SS, but I ran the antenna to the trunk and up the rear window molding to the top rear of the roof. That seems to work fine. I've read that the antenna should work fine from the inside of the car, but I'm wondering if the Sungate windshield interferes with the XM signal. Anyone know for sure? Thanks!