There is a button labeled Seek Cat for the audion system. What is it supposed to do and how do you get it to work? If I push it while on XM radio-it seem to go to the next XM category. If I read the owners manual, I believe it is supposed to go to the next xm station of the catagory it is currently on but I cannot figure out how that is supposed to happen. My wifes Yukon has a very nice XM category capability to it-you hit the touch screen category and you can quickly see a list of stations for that category and switch. You can also switch categories on the same screen. It is very easy to use and navigate.