GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 Bonneville 🢒 Engine 🢒 Engine Controls - 4.6L 🢒 Idle Air Control Valve Replacement

Removal Procedure

    Object Number: 574138 Size: SH
  1. Remove the electrical connector (1) from the idle air control (IAC) valve (4).

    2. Object Number: 596334 Size: SH
  2. Remove the IAC valve attaching screws (2) from the idle air control valve (1).

    3. Object Number: 481091 Size: SH
  3. Remove the IAC valve from the throttle body.
  4. Remove the IAC valve O-ring.

Installation Procedure

    Object Number: 481091 Size: SH
  1. Install the new IAC valve O-ring.

    2. Object Number: 596334 Size: SH
  2. Install the IAC valve (1) into the throttle body.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the IAC valve attaching screws (2) into the IAC valve.

    4. Tighten
    Tighten the IAC valve attaching screws to 3 N·m (27 lb in).


    Object Number: 574138 Size: SH
  4. Install the electrical connector (1) into the idle air control valve (4).
  5. The powertrain control module (PCM) will reset the idle air control valve whenever the ignition switch is turned ON, then OFF.
  6. Turn the ignition switch ON.
  7. Turn the ignition switch OFF.
  8. Perform the IAC Valve Learn Procedure:
    9. 8.1. Start and idle the engine for 15 seconds.
    8.2. Turn the ignition switch to the LOCK/OFF position.
    8.3. Wait 15 seconds.
    8.4. Restart the engine , and check for proper idle operation.