WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Indicators, Power, Ground, Front End Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 2: Left Side Impact Sensor and Module, Roof Rail Module, Steering Module, Pretensioner
Courtesy of GENERAL MOTORS CORP.
Fig 3: Right Side Impact Sensor and Module, Roof Rail Module, I/P Module, Pretensioner