WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. 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: 5-Volt and Low Reference - 1 of 2
Courtesy of GENERAL MOTORS CORP.
Fig 3: 5-Volt and Low Reference - 2 of 2
Courtesy of GENERAL MOTORS CORP.
Fig 4: Pressure and Temperature Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 5: MAF, VSS and Stop Lamp Switch
Courtesy of GENERAL MOTORS CORP.
Fig 6: Oxygen Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 7: Electronic Throttle Controls
Courtesy of GENERAL MOTORS CORP.
Fig 8: Ignition Controls - Bank 1 (Odd) Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 9: Ignition Controls - Bank 2 (Even) Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 10: Ignition Controls - Knock and CKP Sensors and Engine Speed
Courtesy of GENERAL MOTORS CORP.
Fig 11: Ignition Controls - CMP Sensors and Solenoids