When we took delivery of our P85 almost 1 month ago we noticed that we were getting an error msg while trying to receive XM radio stations. We brought the car into service and they said the antenna was not hooked up. So they, I believe, replaced the rear window, connected the XM antenna and let the glue cure overnight. This of course solved the problem of reception, however I've noticed that all the XM stations cut out frequently with a hissing sound and then come back on about 2-3 seconds later. This is very annoying as you can imagine. Yesterday, I pulled my Escalade and my P85 side by side and compared XM radio reception. The Escalade's XM radio never cut out during the 10 minute test while the P85's XM radio which was dialed into the same NFL channel cut out continuously. I switched channels several times and received the same results. Has anyone experienced this situation?