Do you have the traffic on the map, coming from Sirius Travel Link? My sat. radio apears to refuse the Traffic Plus item from their Travel Link (to which I subscribed explicitly for $6/mo, but it may have been part of the trial Sirius subscription that they give us). The Sirius rep claimed, after a long chat, that my sat. radio has something disabled and that the dealer would be able to enable it for use of Traffic Plus, which sounds fishy to me. (Firmware update?)
I have TP with a navigation SD card from Amazon, which works perfectly except for the traffic info.
(I know I can use Android Auto with Google maps and traffic, but it doesn't play well with the control wheel, the native nav. is so much better.)