How about a guess. One of each:
http://www.sounddomain.com/sku/PIOCDRB10
http://www.sounddomain.com/sku/PIOCDRB20
PIOGM1 --> PIOCDRB20 --> PIOCDRB10
JUST A GUESS!
Of course, you could buy the Pioneer XM Module. The advantage is that the GM radio would control and display the XM.
Klaus
"God made some men big and some men small, but Sam Colt made them all equal."
[This message was edited by Klaus on 11-07-03 at 11:46 AM.]