2005 Chevrolet ClassicFACTORY OEM SERVICE PROCEDURE

Engine Controls Component Views

Fig 1: Engine Controls Component View
GM795737Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Idle Air Control (IAC) Valve
2 Throttle Position (TP) Sensor
3 Manifold Absolute Pressure (MAP) Sensor
4 Brake Fluid Reservoir
5 Evaporative Emission (EVAP) Canister Purge Solenoid
6 Engine Coolant Temperature (ECT) Sensor
7 G110/G112
Fig 2: Crankshaft Position Sensor & Engine Oil Pressure Sensor Harness Routing View
GM903441Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Engine Oil Pressure Sensor
2 C104
3 Crankshaft Position (CKP) Sensor
Fig 3: Below the Left Side of the I/P, Near the Steering Column Component View
GM264425Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 IP Harness
2 Engine Harness
3 Powertrain Control Module Connectors
4 Body Harness
5 Rear Compartment Lid Release Switch
Fig 4: Fuel Injector Rail Assembly
GM901654Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 C102
2 Fuel Injector 4
3 Fuel Injector 3
4 Fuel Injector 2
5 Fuel Injector 1
Fig 5: Fuel Pump & Sender Assembly
GM61866Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Fuel Tank Pressure (FTP) Sensor
2 Fuel Pump and Sender Assembly
3 Fuel Pump Strainer
4 Fuel Level Sensor
Fig 6: IAT, ICM & Knock Sensors
GM799009Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Intake Air Temperature (IAT) Sensor
2 Ignition Control Module (ICM)
3 ICM Interconnect
4 Knock Sensor (KS)
5 C103
Fig 7: Heated Oxygen Sensor (HO2S) Sensor 2
GM217420Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Heated Oxygen Sensor (HO2S) Sensor 2
2 TWC Catalyst
Fig 8: Heated Oxygen Sensor (HO2S) Sensor 1
GM217426Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Exhaust Manifold
2 Heated Oxygen Sensor (H02S) Sensor 1
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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