WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Door Control Module Wiring Schematic - Driver Door Module (DDM) Power & Ground
Courtesy of GENERAL MOTORS CORP.
Fig 2: Door Control Module Wiring Schematic - Passenger Door Module (PDM) Power & Ground
Courtesy of GENERAL MOTORS CORP.
Fig 3: Door Control Module Wiring Schematic - Driver Door Module (DDM) Inputs/Outputs
Courtesy of GENERAL MOTORS CORP.
Fig 4: Door Control Module Wiring Schematic - Front Passenger Door Module (FPDM) Inputs/Outputs
Courtesy of GENERAL MOTORS CORP.
Fig 5: Door Control Module Wiring Schematic - Left Rear Door Module (LRDM) Power, Ground & I/O
Courtesy of GENERAL MOTORS CORP.
Fig 6: Door Control Module Wiring Schematic - Right Rear Door Module (RRDM) Power, Ground & I/O
Courtesy of GENERAL MOTORS CORP.
Fig 7: Door Control Module Wiring Schematic - Driver Door Switch Assembly
Courtesy of GENERAL MOTORS CORP.
Fig 8: Door Control Module Wiring Schematic - Power Door Serial Data