WARNING: This page is about a different car, the 2005 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Driver Door Module (DDM) Power and Ground
Courtesy of GENERAL MOTORS CORP.
Fig 2: Front Passenger Door Module (FPDM) Power and Ground
Courtesy of GENERAL MOTORS CORP.
Fig 3: Driver Door Module (DDM) Inputs/Outputs Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 4: Front Passenger Door Module (FPDM) Inputs/Outputs Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 5: Left Rear Door Module (LRDM) Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 6: Right Rear Door Module (RRDM) Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 7: Driver Door Switch Assembly (DDSA) Schematic