WARNING: This page is about a different car, the 2005 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, Indicators and Messages Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 2: Wheel Speed Sensors Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 3: Brake Pedal Signal and Traction Control Switch Schematics