well jim i went to the caddy dealer right when i first got my av, and got a quote for the ext rack. my av doesnt have a rack from factory. so the price for me to get everything need to have the ext rack is about $500. then being that is a tricky task to get the holes drilled for it, so i would prefer to have either the dealership or a body shop install it. because all you have to do is get a hole off by a half inch off and the whole istall is put on hold because now you have to bondo and repaint roof. so im not sure what they would charge to install, but im putting the total price probably around $600-650.