WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Sensing And Diagnostic Module (SDM), Air Bag Indicator Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Steering Wheel Module, IP Module, Front Discriminating Sensors, SDM Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: SDM, Side Impact Sensors And Seat Modules Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: SDM, Pretensioners, Seat Belt Switches, Seat Position And Occupant Sensors Schematic