Navigator,
http://elcova.com/groupee/forums?q=Y&a=tpc&s=2826088551&f=6706011751&m=68360 83505&p=2
See what this forum member wrote. He is saying that he can play all 12 CDs that he has in his 12 disc changer, although he doesn't have XM as of yet, but the PIOGM1V2 should work for 12 disc and XM, shouldn't it?
Shawn