WARNING: This page is about a different car, the 2008 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DDM Power, Ground and Serial Data
Courtesy of GENERAL MOTORS CORP.
Fig 2: DDM Outside Rearview Mirror and Moveable Window References
Courtesy of GENERAL MOTORS CORP.
Fig 3: DDM Door Lock References
Courtesy of GENERAL MOTORS CORP.
Fig 4: FPDM Power, Ground and Serial Data
Courtesy of GENERAL MOTORS CORP.
Fig 5: FPDM Moveable Window and Door Lock References