WARNING: This page is about a different car, the 2006 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Driver Door Module (DDM) Power, Ground, and Serial Data
Courtesy of GENERAL MOTORS CORP.
Fig 2: DDM Controlled/Monitored Subsystem References (1 of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 3: DDM Controlled/Monitored Subsystem References (2 of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Front Passenger Door Module (FPDM) Power, Ground, and Serial Data
Courtesy of GENERAL MOTORS CORP.
Fig 5: FPDM Controlled/Monitored Subsystem References (1 of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 6: FPDM Controlled/Monitored Subsystem References (2 of 2)
Courtesy of GENERAL MOTORS CORP.
Fig 7: Left Rear Door Module (LRDM) Power, Ground, and Serial Data