WARNING: This page is about a different car, the 2007 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Module Power, Ground, Serial Data And MIL Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Engine Data Sensors - 5-Volt Reference Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - MAF and Engine Coolant Temperature Sensor Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - Oxygen Sensors Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - Throttle Actuator Controls Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 6: Ignition Controls - Bank 1 Ignition Controls Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 7: Ignition Controls - Bank 2 Ignition Coils Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 8: Ignition Controls - CMP Sensors and Solenoids Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 9: Crankshaft Position (CKP) and Knock Sensors Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 10: Fuel Controls - Fuel Pump and Injectors Schematic