Ok, although I haven't made it to the car yet (called in a bit late..heh) I just had to look at XM. I HAVE no channel 19! While I was more interested in NHL (still on but jumped around a bit) as well as three Big 10 stations, Boneyard has an "unlisted number for XM." Sigh...
www.xmradio.com/onxm/full-channel-listing.xmc

BTW, feel the same about Liquid Metal. Gotta suffer through lots of slag to get to some Priest, Maiden, Sabbath, Ozzy, etc. Quite the eclectic metal mix there.