Installed my GXM-30 antenna to my zumo 550 and activated XM service. The big negative to this setup is that XM service does not work via bluetooth on the zumo550! I wish I new this before hand!
I have to either use a wired setup to my scala rider or buy a bluetooth dongle to attach to the zumo. Frustrating! More crap to hang on the bike.
'09 BMW R1200GSA Adventure! (gone)