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Home >> Chevrolet >> 2004 >> Monte Carlo LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System 3.4L (Introduction) >> Repair Instructions >> Idle Air Control (IAC) Valve Replacement >> Installation Procedure
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Installation Procedure

NOTE: The IAC valve may be damaged if installed with the cone (pintle) extended more than 28 mm (1-1/8 in). Measure the distance that the valve is extended before installing a new valve. The distance from the idle air control valve motor housing to the end of the idle air control valve pintle should be less than 28 mm (1-1/8 in). Manually compress the pintle until the extension is less than 28 mm (1-1/8 in).
  1. Install the new IAC valve O-ring.
  2. Fig 1: Installing IAC Valve O-Ring
    GM185626Courtesy of GENERAL MOTORS CORP.
  3. Install the IAC valve.
  4. Fig 2: Installing IAC Valve
    GM185583Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the IAC valve screws.

    Tighten:  Tighten the screws to 3.0 N.m (27 lb in).

  6. Fig 3: Installing IAC Valve Screws
    GM185614Courtesy of GENERAL MOTORS CORP.
  7. Connect the IAC valve electrical connector.
  8. Fig 4: View Of IAC Valve Electrical Connector
    GM69056Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The powertrain control module (PCM) will reset the IAC valve whenever the ignition is turned ON, then OFF. Turn the ignition ON for 10 seconds, then OFF for 5 seconds.
  9. Start the engine and allow the engine to reach a normal operating temperature.