WARNING: This page is about a different car, the 2007 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power and Ground
Courtesy of GENERAL MOTORS CORP.
Fig 2: Wheel Speed Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 3: Yaw and Lateral Acceleration, Steering Angle Sensor
Courtesy of GENERAL MOTORS CORP.
Fig 4: Brake Pedal Position, Traction Control Switch, Data Link Communications