Doesn't appear to be only our trucks. Read same problem in an Avalanche forum, a GM Truck forum, a Cadillac forum, and an XM411 thread about a Tahoe. LOL! According to a
THIS on XM's site, it should show "further info"...notice how it's greyed out though for them too! Says same in Nav Supplement manual that came with my truck: "When XM? is active, the channel name and number, song title and artist will display on the screen.
Touch the XM Info screen button to display additional XM station information."
Ok...so I went through like all 200 channels...slowly!...never lit once. Maybe I'll email Delphi and see what the extra info would be, and then contact XM and see what's up.