WARNING: This page is about a different car, the 2010 GMC Yukon, 2010 Chevrolet Tahoe, and 2010 Cadillac Escalade. 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 and Low Reference
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - Pressure and Temperature
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - Oxygen Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - Throttle Controls
Courtesy of GENERAL MOTORS CORP.
Fig 6: Ignition Controls - Ignition System Coils 1, 3, 5, and 7
Courtesy of GENERAL MOTORS CORP.
Fig 7: Ignition Controls - Ignition System Coils 2, 4, 6, and 8
Courtesy of GENERAL MOTORS CORP.
Fig 8: Ignition Controls - Sensors and Active Fuel Management (AFM) Controls