WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DDM Power, Ground and DLC Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: DDM Signals/Controls (1 of 2) Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: DDM Signals/Controls (2 of 2) Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: FPDM Power, Ground and DLC Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 5: FPDM Signals/Controls (1 of 2) Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 6: FPDM Signals/Controls (2 of 2) Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 7: LRDM Power, Ground and DLC Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 8: LRDM Signals/Controls Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 9: RRDM Power, Ground and DLC Wiring Schematic