I have a '98 Blazer with the factory radio. It says I have an "AUX" port, but I am skeptical that there is actually a pair of RCA ports in the back for an aux input. Has anyone dealt with these radios before? I would like to directly hard wire my satellite radio to the head unit rather than using the FM transmitter.

Thanks!

Unfortunately, you are right... there aren't rca inputs back there... You need something along the line of this adapter. (http://www.installer.com/item/display_item.php?it=gm9-aux)

It would depend on your radio as to exactly which one is needed.