WARNING: This page is about a different car, the 2010 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, and Communication
Courtesy of GENERAL MOTORS CORP.
Fig 2: Wheel Speed Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 3: Yaw and Lateral Acceleration, and Steering Angle Sensors