GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Rendezvous - FWD 🢒 Engine 🢒 Engine Controls - 3.4L 🢒 Idle Air Control Valve Replacement

Removal Procedure
  1. Remove the throttle control cable bracket from the throttle body. Refer to Accelerator Control Cable Bracket Replacement .
  2. Remove the canister purge valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .

    3. Object Number: 69056 Size: SH
  3. Disconnect the idle air control (IAC) electrical connector.

    4. Object Number: 185614 Size: SH
  4. Remove the idle air control valve attaching screws.

    5. Object Number: 185583 Size: SH
  5. Remove the idle air control valve.

    6. Object Number: 185626 Size: SH
  6. Remove the idle air control valve O-ring.

Installation Procedure

    Object Number: 185626 Size: SH

    Notice: 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 idle air control O-ring.

    2. Object Number: 185583 Size: SH
  2. Install the idle air control valve into the throttle body.

    3. Object Number: 185614 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Reinstall the idle air control valve attaching screws.

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


    Object Number: 69056 Size: SH
  4. Connect the IAC electrical connector.
  5. Install the canister purge valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .
  6. Install the throttle control cable bracket. Refer to Accelerator Control Cable Bracket Replacement .
  7. The powertrain control module (PCM) will reset the idle air control valve whenever the ignition is turned ON, then OFF. Turn the ignition ON, then OFF.
  8. Start the engine and allow the engine to reach operating temperature.