I have a 2005 C6 coupe and I ordered the XM radio with my Nav Package, personally, I think it's a waste of money, I live in Houston, and there are probably about 50 local radio stations here and in the general area, and considering I only drive my baby on weekends and XM is about $12 a month, and my CD player plays MP3's.....I don't really need it and it's a waste of money for me....I won't renew my subscription, and besides I've noticed that the local FM stations have a lot more power than XM when I switch from one to the other (XM to FM) I have to raise the volume, XM just dosen't seem to push much power.....and I hate that godawful ugly black knob of an antenna that GM came up with, UGH!! I'm thinking of getting it painted to match the body so it will kinda hide it..... LOL I wish I could get my money back....Oh well, live and learn
just my 2 cents IMHO