WARNING: This page is about a different car, the 2008 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
Courtesy of GENERAL MOTORS CORP.
Fig 2: Engine Data Sensors - 5-Volt Reference
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - MAF and Engine Coolant Temperature Sensor
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - Oxygen Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - Throttle Actuator Controls
Courtesy of GENERAL MOTORS CORP.
Fig 6: Ignition Controls - Bank 1 Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 7: Ignition Controls - Bank 2 Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 8: Ignition Controls - CMP Sensors and Solenoids
Courtesy of GENERAL MOTORS CORP.
Fig 9: Crankshaft Position (CKP) and Knock Sensors