I am trying to instal the factory navigation system on my 2009 (850 miles) CTS. I have acquired the radio, motorized screen, and control panel for the nav option. I am trying to find out if the wiring for this is already in the car or if additional wiring is necessary or even available. I have read all threads on this forum and others. I have been to my dealer who kindly ran of off the parts sheet for the dash. He however had no idea and suggested that i contact cadillac. I sent an email to them on their customer assistance address and was told that they did not offer technical advice and that i should contact my all knowing dealer. No wonder they are ready for bankrupsy court!. If any one knows anything about the internal wiring of a new 2009 CTS please let me know.