2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Engine Controls Component Views

Fig 1: Left Front Of Engine Compartment Component View
GM1101345Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Air Cleaner/PCM Housing
2 A/C Refrigerant Pressure Sensor
3 Powertrain Control Module (PCM), C2
4 Powertrain Control Module (PCM), C1
5 Powertrain Control Module (PCM)
Fig 2: Left Of Engine Component View (L36/L67)
GM757028Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Mass Air Flow (MAF) Sensor
2 Intake Air Temperature (IAT) Sensor
3 Throttle Position (TP) Sensor
4 Idle Air Control (IAC) Valve
Fig 3: Front Of Engine Component View (L36/L67)
GM193776Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Mass Air Flow (MAF) Sensor
2 Idle Air Control (IAC) Valve
3 Throttle Position (TP) Sensor
4 Fuel Pressure Test Connector
5 Engine Coolant Temperature (ECT) Sensor
6 Fuel Injector 5
7 Evaporative Emission (EVAP) Canister Purge Solenoid
8 Engine Oil Level Switch
9 Crankshaft Position (CKP) Sensor
10 Camshaft Position (CMP) Sensor-Behind Water Pump Pulley
11 Ignition Control Module (ICM)
12 Positive Crankcase Ventilation (PCV) Valve-Under MAP Sensor
13 Manifold Absolute Pressure (MAP) Sensor
14 C110
15 Fuel Pressure Regulator
Fig 4: Upper Left Front Of Engine Component View (L36)
GM460302Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Injector 3
2 Evaporative Emission (EVAP) Canister Purge Solenoid
3 Fuel Injector 5
4 Idle Air Control (IAC) Valve
5 Throttle Position (TP) Sensor
6 Mass Air Flow (MAF) Sensor
7 S106
8 Engine Coolant Temperature (ECT) Sensor Connector
9 C110
10 A/C Compressor Clutch Diode
11 To A/C Compressor
12 Ignition Control Module (ICM)
13 To Manifold Absolute Pressure (MAP) Sensor
14 Fuel Injector 1 Connector
Fig 5: Upper Left Front Of Engine Component View - L67
GM752781Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Idle Air Control (IAC) Valve
2 Throttle Position (TP) Sensor
3 Mass Air Flow (MAF) Sensor Connector
4 Intake Air Temperature (IAT) Sensor Connector
5 Supercharger Boost Control Solenoid
6 Fuel Injector 5
7 Fuel Injector 3
8 Fuel Injector 1
9 C110
10 C126
Fig 6: Upper Right Center Of Engine Component View (L36)
GM460295Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Manifold Absolute Pressure (MAP) Sensor Connector
Fig 7: Upper Rear Of Engine Component View (L67)
GM757025Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Positive Terminal of the Generator
2 Generator
3 Generator Connector
4 Manifold Absolute Pressure (MAP) Sensor
5 Fuel Injector 2 - Connector
6 Fuel Injector 4
7 Fuel Injector 6
8 Evaporative Emission (EVAP) Canister Purge Solenoid
Fig 8: Right Front Of Engine Component View (L36/L67)
GM1043757Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Camshaft Position (CMP) Sensor
2 Ignition Control Module (ICM) Wiring Harness
3 C110
4 Ignition Control Module (ICM)
5 Ignition Coils
6 G111
7 Ignition Control Module (ICM) Wiring Harness
8 Ignition Control Module (ICM) Wiring Harness
9 Crankshaft Position (CKP) Sensor
Fig 9: Upper Left Rear Of Engine Component View (L36/L67)
GM374691Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Exhaust Gas Recirculation (EGR) Valve
2 Heated Oxygen Sensor (HO2S) 1
Fig 10: Lower Front Of Engine Component View (L36/L67)
GM752798Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Battery Positive Cable
2 Fusible Link
3 G113
4 Negative Battery Cable
5 Starter
6 Solenoid Start Terminal S
7 Engine Oil Level Switch
8 Knock Sensor (KS) Bank 1
Fig 11: Left Front Of Engine Component View (L36)
GM741696Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C110
2 C126
3 Evaporative Emission (EVAP) Canister Purge Solenoid
Fig 12: Lower Right Rear Of Engine Component View - L36/L67
GM743024Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C125 - Knock Sensor Jumper Harness
2 Engine Oil Pressure (EOP) Switch
3 Vehicle Speed Sensor
4 C125 - Engine Harness
Fig 13: Right Middle Of Engine Component View (L36)
GM189375Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Camshaft Position (CMP) Sensor
Fig 14: Rear Middle Of Engine Component View (L36/L67)
GM190969Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Knock Sensor (KS) 2
Fig 15: Behind Engine, Under Vehicle Component View
GM305319Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Heat Shield
2 Catalytic Converter
3 Heated Oxygen Sensor (HO2S) Sensor 2
Fig 16: Fuel Pump & Sender Assembly Component View
GM50636Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Line Quick Connector
2 Fuel Pump
3 Base Plate
4 Fuel Strainer
5 Fuel Level Sensor
6 Springs
7 Fuel Tank Pressure (FTP) Sensor
Fig 17: Left Rear Of Vehicle Component View
GM571274Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Evaporative Emission (EVAP) Canister Vent Solenoid Connector
2 Evaporative Emission (EVAP) Canister Vent Solenoid
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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