So long as you have that blue fakra connector and the antenna already in your van. Your antenna, slim black and square shaped, should be on the driver side of the roof right above your head. If those are both there you should be good in terms of having the appropriate devices. I have no idea how to activate the tuner though. Maybe they will do it, $$, when you buy the $195 module?
I actually asked my dealer after I bought it, because my van came with a 1 year free subscription but no tuner...?? They told me you have to buy it in the radio, which I thought was a crock. However I dont have to worry about that stuff anymore because the Pioneer unit I installed is way better.
The XM tunner and antenna for aftermarket stereos is $36 on amazon:
SiriusXM-SXV300v1-Connect-Vehicle-Satellite but I doubt that will work with the UC5.0. The $195 that was mentioned earlier in the thread seems outrageous! Unless it also gives you GPS access, which I highly doubt that one.
Good luck!