My HD radio suddenly started acting strangely, on Friday. At first, I thought it was the radio station I was tuned to, but after exploring things yesterday, the symptoms occur on all stations, both AM and FM, with the exception of SirusXM. First, the screen no longer displays the orange HD symbol, beside the station, which allows you to prompt the secondary menu, and select other digital stations. The station I normally listen to has 2 other digital stations. The second issue, is all stations, (except SirusXM) fade completely out and back on, for 2-3 seconds, every 5 seconds, making listening unbearable. I have read the manuals, looking for help, but cannot find anything related to this malfunction. The other functions, in Entune, seem to be fine. Audio from iPhone works fine. I am getting ready to take a trip, and definitely stressed about this. I guess, better now, than in the middle of the trip. I will contact the dealer tomorrow, and take it in. Does anyone have any ideas, or any experience with similar problems? My first thoughts were around the antenna.