GM Service Manual Online
For 1990-2009 cars only
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Figure 1:

Ignition Coils, Injectors, and Heated Oxygen Sensor (HO2S) (Bank 1 and 2)
Object Number: 1469207 Size: LF
(1)Fuel Injector 1
(2)Fuel Injector 2
(3)Fuel Injector 3
(4)Fuel Injector 4
(5)Fuel Injector 5
(6)Fuel Injector 6
(7)Ignition Coil
(8)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(9)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(10)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
(11)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
Figure 2:

Camshaft Position (CMP), Crankshaft Position (CKP) and Engine Coolant Temperature (ECT) Sensors, EVAP Purge Solenoid Valve
Object Number: 1469209 Size: LF
(1)Camshaft Position (CMP) Sensor and Connector
(2)Crankshaft Position (CKP) Sensor
(3)EVAP Canister Purge Solenoid Valve
(4)Engine Coolant Temperature (ECT) Sensor 2.5L
Figure 3:

Intake Air Temperature (IAT) Sensor, Throttle Body (MTIA) , Exhaust Gas Recirculation (EGR) and Intake Manifold Tuning Valve (IMTV) Solenoid
Object Number: 1469210 Size: LF
(1)Intake Air Temperature (IAT) Sensor
(2)Main Throttle Idle Actuator (MTIA)
(3)Exhaust Gas Recirculation (EGR) Valve 2.5L
(4)Intake Manifold Tuning Valve (IMTV) Solenoid
Figure 4:

Knock Sensors (KS)/ Manifold Absoulte Pressure (MAP) Sensor
Object Number: 1469213 Size: MF
(1)Manifold Absoulte Pressure (MAP) Sensor
(2)Knock Sensor (KS) and Connector
Figure 5:

Engine Harness 2.5L (1 of 3)
Object Number: 1864918 Size: MF
(1)Battery
(2)Engine Control Module (ECM)
(3)Fuse Block - Underhood
Figure 6:

Engine Harness 2.5L (2 of 3)
Object Number: 1864919 Size: MF
(1)Injector 1
(2)Injector 2
(3)Injector 3
(4)Injector 4
(5)Injector 5
(6)Injector 6
(7)Starter Motor
(8)Knock Sensor - Bank 2
(9)G106
(10)G103
(11)G104
(12)X106
(13)Knock Sensor - Bank 1
(14)X107
(15)Generator
Figure 7:

Engine Harness 2.5L (3 of 3)
Object Number: 1864920 Size: MF
(1)Electronic Throttle Control (ETC)
(2)Exhaust Gas Recirculation (EGR) Solenoid Valve
(3)EVAP Canister Purge Solenoid Valve
(4)Heated Oxygen Sensor (HO2S) 1 - Bank 2
Figure 8:

Engine Harness 2.0L (1 of 3)
Object Number: 1864915 Size: MF
(1)Diesel Particulate Pressure Sensor
(2)Glow Plug Control Unit
(3)Engine Control Module (ECM)
(4)Exhaust Gas Temperature Sensor
Figure 9:

Engine Harness 2.0L (2 of 3)
Object Number: 1864916 Size: MF
(1)Injector 1
(2)Injector 2
(3)Injector 3
(4)Injector 4
(5)Exhaust Gas Recirculation Solenoid Valve
(6)Crankshaft Position Sensor
(7)Boost Pressure Actuator
Figure 10:

Engine Harness 2.0L (3 of 3)
Object Number: 1864917 Size: MF
(1)Fuel Rail Pressure Sensor
(2)Boost Pressure Sensor
(3)Camshaft Position Sensor (CMP)
(4)Throttle Plate Actuator
(5)Starter Solenoid
(6)Fuel Injection Pump
(7)Generator
(8)Engine Coolant Temperature (ECT) Sensor