WARNING: This page is about a different car, the 2005 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, Serial Data, MIL and Indicators
Courtesy of GENERAL MOTORS CORP.
Fig 2: Underhood Fuse Block Main Relay - 1 of 2
Courtesy of GENERAL MOTORS CORP.
Fig 3: Underhood Fuse Block Main Relay - 2 of 2
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - 5-Volt Reference Bus
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - Low Reference Bus
Courtesy of GENERAL MOTORS CORP.
Fig 6: Engine Data Sensors - BARO, ECT and MAF/IAT Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 7: Engine Data Sensors - Heated Oxygen Sensors (HO2S)
Courtesy of GENERAL MOTORS CORP.
Fig 8: Engine Data Sensors - Throttle Actuator Control (TAC) System
Courtesy of GENERAL MOTORS CORP.
Fig 9: Ignition Controls - Bank 1 (Odd) Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 10: Ignition Controls - Bank 2 (Even) Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 11: Ignition Controls - Camshaft Position (CMP) Sensors and Actuator Solenoids
Courtesy of GENERAL MOTORS CORP.
Fig 12: Ignition Controls - Knock and Crankshaft Position (CKP) Sensors