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).

Install the new IAC valve O-ring.

Fig 1: Installing IAC Valve O-Ring

Courtesy of GENERAL MOTORS CORP.

Install the IAC valve in the throttle body.

Fig 2: Installing IAC Valve Throttle Body

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NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the IAC valve screws.
Tighten: Tighten the screws to 3 N.m (27 lb in).

Fig 3: Installing IAC Valve Screws

Courtesy of GENERAL MOTORS CORP.

Connect the IAC valve electrical connector.

Fig 4: View Of IAC Valve Electrical Connector

Courtesy of GENERAL MOTORS CORP.

The powertrain control module (PCM) will reset the IAC valve whenever the ignition is turned ON, then OFF. Turn ON the ignition for 10 seconds, then OFF for 5 seconds.
Start the engine and allow the engine to reach operating temperature.
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.