2004 Chevrolet Impala SSFACTORY OEM SERVICE PROCEDURE

Removal Procedure

NOTE: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.
Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.
  2. Partially drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
  3. Remove the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement .
  4. Disconnect the idle air control (IAC) valve electrical connector.
    5. Fig 1: View Of IAC Valve Electrical Connector
    GM155466Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the mass air flow (MAF) sensor electrical connector.
    6. Fig 2: Disconnecting MAF Sensor Electrical Connector
    GM155464Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the throttle position (TP) sensor electrical connector.
    7. Fig 3: Disconnecting TP Sensor Electrical Connector
    GM178680Courtesy of GENERAL MOTORS CORP.
  7. Remove the accelerator controls cable bracket. Refer toAccelerator Controls Cable Bracket Replacement .
    8. Fig 4: Removing Vacuum Line
    GM180061Courtesy of GENERAL MOTORS CORP.
  8. Remove the vacuum line from the throttle body.
  9. Remove the throttle body nuts.
  10. Remove the throttle body assembly.
    11. NOTE: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.
    Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
  11. Clean the throttle body gasket mating surfaces.
    12. Fig 5: Removing Throttle Body
    GM12267Courtesy of GENERAL MOTORS CORP.
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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