I dont see any reason that it shouldn't unlock, as they are all compatible between vehicles. However, I'm not sure about the newer ones, but the older GM trucks had premium Bose on trucks and most SUV's, and luxury Bose on Escalade and Denali. If they still do this, and your friend's yukon is a Denali, then it is possible there is some sort of compatibility issue between the systems.
Other than that, it should unlock and work just fine, so good luck and keep us posted
Other than that, it should unlock and work just fine, so good luck and keep us posted
