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: DLC, Ground, MIL and Power Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 2: 12-Volt and 5-Volt Reference Bussing Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 3: Low Reference Bussing Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - Pressure, Temperature, MAF, VSS and Brake Travel Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - Oxygen Sensors Schematics
Courtesy of GENERAL MOTORS CORP.
Fig 6: Engine Data Sensors - Electronic Throttle Controls Schematics