XM's software that prevents the auto scrolling? I can't believe it is the Delco radio's hardware. If it was, I would think that the FM stations would not work either.
Does anyone have a hand held XM radio? Do they auto scroll?
Yes, XM's own radios past the MyFi (Xpress, Inno, etc.) all scroll when needed. XM's hardware supports it, it's up to the OEMs to incorporate this feature, however. My 2006 Honda doesn't support it, either and has a 16 character max for each Artist and Title. My Inno will show 32 of each and scroll when it doesn't fit on the screen automatically.