2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Installation Procedure

  1. Install the new gasket.
  2. Install the throttle body assembly.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the throttle body nuts.

    Tighten:  Tighten the nuts to 10 N.m (89 lb in).

    4. Fig 1: Installing Throttle Body
    GM12267Courtesy of GENERAL MOTORS CORP.
  4. Install the accelerator controls cable bracket. Refer to Accelerator Controls Cable Bracket Replacement .
  5. Install the vacuum line to the throttle body.
    6. Fig 2: Installing Vacuum Line To The Throttle Body
    GM180061Courtesy of GENERAL MOTORS CORP.
  6. Connect the IAC valve sensor electrical connector.
    7. Fig 3: View Of IAC Valve Electrical Connector
    GM155466Courtesy of GENERAL MOTORS CORP.
  7. Connect the MAF sensor electrical connector.
    8. Fig 4: Connecting MAF Sensor Electrical Connector
    GM155464Courtesy of GENERAL MOTORS CORP.
  8. Connect the TP sensor electrical connector.
    9. Fig 5: Connecting TP Sensor Electrical Connector
    GM178680Courtesy of GENERAL MOTORS CORP.
  9. Install the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement .
  10. Fill the cooling system. Refer toDraining and Filling Cooling System in Engine Cooling.
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.
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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