WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Serial Data, Traction Switch, and Instrument Panel Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Wheel Speed Sensors Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Yaw Rate and Lateral Accelerometer Sensor Schematic (3.4L)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Yaw Rate and Lateral Accelerator Sensor and Steering Angle Sensor Schematic (3.6L)