I have my new GTS radio and the SC-GTSi interface. I'm waiting for the new XM radio that will be here tomorrow and will install it on Tuesday. Have an appointment with the local dealer to have the radio initialized on Wed. Keeping my fingers crossed and will post results here. I will have pix to share also. Here are the instructions. I hope the unit is better than the instructions are. Not very impressed with them.
Feb 26, I have the new radio, XM module and SC-GTSi installed. It took me about 2 hours and I am particular to torque screws to spec. It went pretty well except that they expect you to install the adapter where the CB radio goes. That won't work. However, it will install on the other side between the radio and the media pocket. The cable takes up a lot of room and should probably be shorter. I did manage to get it all stuffed in behind the fairing. I also have a WHIM installed that takes up space where the CB is located. So if you are the proud owner of a CVO Limited you will have to face that challenge. I have pictures but I'm not sure how I can share them because they are quite large and there are about a dozen or so. Not sure that the pictures will be of any help either. It powers up and I was able to pair my phone and my wife's phone with no trouble. I go to the dealer tomorrow (2-27) to have the unit flashed to make it all play. I will post again when that is complete. Keeping fingers crossed.
Update:
2/27 - Had radio flashed by my dealer and everything seems to work except CB. It is grayed out in the menu. There is a bug with the system such that the radio displays the message "! This radio is not compatible with this vehicle. Please contact your Harley-Davidson dealership". Message goes away by turning off the radio for a minute and turning it back on. Soundz is aware and working on a fix. So far, I'm delighted. This new radio is incredibly better than that old piece of crap that I have dealt with for five and a half years.
If you need pictures, I will try to figure out a way of presenting them but I really don't think they would be of much help.
Carry on.