WARNING: This page is about a different car, the 2007 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, Serial Data, and Audio Signal Communication
Courtesy of GENERAL MOTORS CORP.
Fig 2: Radio Antenna Module and Antennas
Courtesy of GENERAL MOTORS CORP.
Fig 3: Digital Radio Reciever (U2Y/U2X/U2K/U2L)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Speakers (U66)
Courtesy of GENERAL MOTORS CORP.
Fig 5: Speakers (U57)
Courtesy of GENERAL MOTORS CORP.
Fig 6: TV Antenna Module, Amplifier, TV Rear Glass Antenna, and Auxiliary RCA Video Jacks (Export w/U2Y/U2X)
Courtesy of GENERAL MOTORS CORP.
Fig 7: Traffic Information Receiver (Japan w/U2Y/U2X)
Courtesy of GENERAL MOTORS CORP.
Fig 8: Navigation Antenna, Radio, Audio Amplifier, VCIM, and ISRVM