Ah ha, Tom, I think you may have the answer. The Sirius must go through the RV radio. However....., I ain't got an RV radio anymore. I had it replaced with a Pioneer GPS which has all of the functions of the RV radio in addition to navigation. It appears my installer did not connect the Sirius to the Pioneer. It seems to me I heard him say something like, "I wonder what these wires connect to."
The RV is at Camping World tomorrow hookin' up my toad. After that I will talk to the GPS installer and see what can be done.
Thanks,