I am in the same situation wanting XM does the 17803005 fit my 03 with the 2006 touchscreen nav? I called my local dealer and they dont know.

 

In doing some more research I found out that the 1780-3005 is just for the H3 and the H2 XM kit is 1780-2609 The only bummer for me is it says not for vehicles with roof mounted am-fm antenna and that is what my truck has. I am about to spend the $350 to find out.