Removal (4.3L)

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NOTE: If the Idle Air Control (IAC) valve has been in service, DO NOT push or pull on the IAC valve pintle. The force required to move the pintle may damage the threads on the worm drive. Also, DO NOT soak the IAC valve in any liquid cleaner or solvent, as damage may result.

Turn ignition off. Remove the engine cover. Disconnect the harness connector from the Idle Air Control (IAC) valve. Remove the IAC valve attaching fasteners. See Fig 1. Remove the IAC valve assembly. Remove the "O" ring. See Fig 2.

Fig 1: Removing/Installing IAC Valve Mounting Screws

Courtesy of GENERAL MOTORS CORP.

Fig 2: Removing IAC Valve & "O" Ring (4.3L)

Courtesy of GENERAL MOTORS CORP.