WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, Serial Data, DIC and Indicator
Courtesy of GENERAL MOTORS CORP.
Fig 2: Engine Data Sensors - 5 Volt and Low Reference Buses
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - MAP, ECT, MAF and IAT Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors - Heated Oxygen Sensors (HO2S)
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors - Throttle Actuator Control (TAC) System
Courtesy of GENERAL MOTORS CORP.
Fig 6: Ignition Controls - Odd Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 7: Ignition Controls - Even Ignition Coils
Courtesy of GENERAL MOTORS CORP.
Fig 8: Ignition Controls - Knock, CKP and CMP Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 9: Fuel Controls - Fuel Injectors and Fuel Pump and Sender Assembly