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

Front of the Engine Components (L26)


Object Number: 1552089  Size: LF
(1)Ignition Control Module (ICM)
(2)Manifold Absolute Pressure (MAP) Sensor
(3)Fuel Injector 1
(4)Fuel Injector 3
(5)Fuel Injector 5
(6)Exhaust Gas Recirculation (EGR) Valve
(7)Throttle Body
(8)Engine Coolant Temperature (ECT) Sensor
(9)Starter Solenoid
(10)Starter Motor
(11)Engine Oil Level (EOL) Switch
(12)Knock Sensor (KS) 1
Figure 2:

Left Side of the Engine Components (L26)


Object Number: 1552090  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Manifold Absolute Pressure (MAP) Sensor
(3)Throttle Body
(4)Ignition Control Module (ICM)
(5)Crankshaft Position (CKP) Sensor
(6)Engine Oil Pressure (EOP) Switch
(7)Camshaft Position (CMP) Sensor
(8)Heated Oxygen Sensor (HO2S) 1
Figure 3:

Bottom Left of Engine Components (L26)


Object Number: 1552085  Size: LF
(1)Valve Cover
(2)Secondary Air Injection (AIR) Pump (NU6)
(3)Starter Motor
Figure 4:

Rear of the Engine Components (L26)


Object Number: 1552088  Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(2)Throttle Body
(3)Exhaust Gas Recirculation (EGR) Valve
(4)Fuel Injector 6
(5)Fuel Injector 4
(6)Fuel Injector 2
(7)Manifold Absolute Pressure (MAP) Sensor
(8)Camshaft Position (CMP) Sensor
(9)Engine Oil Pressure (EOP) Switch
(10)Knock Sensor (KS) 2
(11)Heated Oxygen Sensor (HO2S) 1
Figure 5:

Left Rear of the Engine Components (L26)


Object Number: 1203638  Size: LF
(1)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
(2)Exhaust Gas Recirculation (EGR) Valve
(3)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
Figure 6:

Top Rear of Engine Components (L26) 1 of 2


Object Number: 1593472  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Fuel Injector 6
(3)Fuel Injector 4
(4)Fuel Injector 2
(5)Generator
(6)Heated Oxygen Sensor (HO2S) 1
Figure 7:

Top Rear of Engine Components (L26) 2 of 2


Object Number: 1552098  Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Intake Manifold
(3)Valve Cover
(4)Secondary Air Injection (AIR) Shutoff valve (NU6)
Figure 8:

Front of Engine Components (LS4)


Object Number: 1907468  Size: LF
(1)Engine Coolant Temperature (ECT) Sensor
(2)Ignition Coil 1
(3)Ignition Coil 3
(4)Ignition Coil 5
(5)Ignition Coil 7
(6)Throttle Body
(7)Engine Oil Pressure (EOP) Sensor
(8)Valve Lifter Oil Manifold (VLOM) Assembly
(9)Coolant Heater (K05)
(10)Knock Sensor (KS) 1
Figure 9:

Left Front of Engine Compartment Components (LS4)


Object Number: 1574086  Size: LF
(1)Transmission Control Module (TCM)
(2)Air Cleaner Housing
(3)Radiator Core Support
(4)Engine Control Module (ECM)
Figure 10:

Top Left Side of Engine Components (LS4)


Object Number: 1677719  Size: LF
(1)Throttle Body
(2)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
(3)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector
Figure 11:

Top of Engine Components (LS4)


Object Number: 1574068  Size: LF
(1)Ignition Coil 8
(2)Fuel Injector 8
(3)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(4)Manifold Absolute Pressure (MAP) Sensor
(5)Throttle Body
(6)Engine Oil Pressure (EOP) Sensor
(7)Fuel Injector 7
(8)Ignition Coil 7
(9)Fuel Injector 5
(10)Ignition Coil 5
(11)Fuel Injector 3
(12)Ignition Coil 3
(13)Fuel Injector 1
(14)Ignition Coil 1
(15)Fuel Injector 2
(16)Ignition Coil 2
(17)Fuel Injector 4
(18)Ignition Coil 4
(19)Fuel Injector 6
(20)Ignition Coil 6
Figure 12:

Rear of Engine Components (LS4)


Object Number: 1907321  Size: LF
(1)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
(2)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(3)Generator
(4)Camshaft Position (CMP) Sensor
(5)Crankshaft Position (CKP) Sensor
(6)Knock Sensor (KS) 2
(7)Ignition Coil 2
(8)Ignition Coil 4
(9)Ignition Coil 6
(10)Ignition Coil 8
(11)Manifold Absolute Pressure (MAP) Sensor
Figure 13:

Top of the Engine Components (LY7)


Object Number: 1530198  Size: LF
(1)Valve Cover - Right
(2)Fuel Injector 5
(3)Intake Manifold
(4)Fuel Injector 6
(5)Fuel Injector 4
(6)Fuel Injector 2
(7)Valve Cover - Left
(8)Fuel Injector 1
(9)Fuel Injector 3
Figure 14:

Front of the Engine Components (LY7) 1 of 2


Object Number: 1517337  Size: LF
(1)X107
(2)J121
(3)J120
(4)J110
(5)J119
(6)X109
(7)J103
(8)J131
(9)J133
(10)G131
(11)Engine Coolant Temperature (ECT) Sensor
(12)Starter Solenoid
(13)Starter Motor
(14)Engine Oil Pressure (EOP) Sensor
Figure 15:

Front of the Engine Components (LY7) 2 of 2


Object Number: 2056815  Size: LF
(1)Ignition Coil 2
(2)Ignition Coil 4
(3)Ignition Coil 6
(4)Engine Coolant Temperature (ECT) Sensor
(5)Knock Sensor (KS) 2
(6)Engine Oil Pressure (EOP) Sensor
Figure 16:

Upper Left Side of the Engine Components (LY7)


Object Number: 1552095  Size: LF
(1)Air Cleaner Assembly
(2)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
(3)Engine Block
Figure 17:

Top Right of the Engine Components (LY7)


Object Number: 1398066  Size: LF
(1)Engine Control Module (ECM) X1
(2)Engine Control Module (ECM)
(3)Engine Control Module (ECM) X2
Figure 18:

Side of the Engine Components (LY7) 1 of 2


Object Number: 868189  Size: LF
(1)Camshaft Position (CMP) Sensor - Bank 1 Exhaust
(2)Camshaft Position (CMP) Actuator Solenoid Valve - Exhaust Bank 1
(3)Camshaft Position (CMP) Actuator Solenoid Valve - Bank 1 Intake
(4)Camshaft Position (CMP) Sensor - Bank 1 Intake
(5)Camshaft Position (CMP) Sensor - Bank 2 Intake
(6)Camshaft Position (CMP) Actuator Solenoid Valve - Bank 2 Intake
(7)Camshaft Position (CMP) Actuator Solenoid Valve - Bank 2 Exhaust
(8)Camshaft Position (CMP) Sensor - Bank 2 Exhaust
Figure 19:

Side of the Engine Components (LY7) 2 of 2


Object Number: 1592824  Size: LF
(1)Ignition Coil 5
(2)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(3)Ignition Coil 3
(4)Ignition Coil 1
(5)Throttle Body
(6)Knock Sensor (KS) 1
(7)Crankshaft Position (CKP) Sensor
(8)Coolant Heater (K05)
Figure 20:

Rear of the Engine Components (LY7)


Object Number: 1552097  Size: LF
(1)Heated Oxygen Sensor (HO2S) 1
(2)Engine Valve Cover
(3)Exhaust Manifold
Figure 21:

Right Front Frame and Underbody (L26)


Object Number: 1552096  Size: LF
(1)Catalytic Converter
(2)Heated Oxygen Sensor (HO2S) 2
Figure 22:

Under Engine Components (LS4)


Object Number: 1203644  Size: LF
(1)Heated Oxygen Sensor (HO2S) 2
Figure 23:

Transaxle


Object Number: 1958522  Size: LF
(1)Pressure Control (PC) Solenoid Valve
(2)1-2 Shift Solenoid (SS) Valve
(3)Automatic Transmission Input Shaft Speed (ISS) Sensor
(4)2-3 Shift Solenoid (SS) Valve
(5)Automatic Transmission Internal Mode Switch (IMS)
(6)Vehicle Speed Sensor (VSS)
(7)Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch
(8)Automatic Transmission Fluid Temperature (TFT)Sensor
(9)Torque Converter Clutch (TCC) Solenoid Valve