WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, MIL, Communication Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: 5-Volt and Low Reference Bussing Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - Pressure, Temperature, MAF/IAT Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - HO2S Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - APP, TAC Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 6: Ignition Controls - Ignition System Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 7: Ignition Controls - Sensors Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 8: Secondary Air Injection (AIR) System Schematic (NU6)