Thread-Locking Material

Important: The hardware used to attach the Throttle Position (TP) sensor and Idle Air Control (IAC) valve is coated with thread-locking adhesive. If these parts are removed for service, inspect the attaching screw threads. There should be enough thread-locking material (adhesive or compound) on the threads to insure proper re-locking. If not, clean the threads and apply Loctite® 262, GM Part No. 1052624, or equivalent, to the threads before reassembly.

1. Remove the IAC valve (1) electrical connector.
2. Remove the two IAC valve attaching screws (4).
3. Remove the IAC valve (1) from the throttle body.
4. Inspect the IAC valve O-ring for cracks or damage. Replace as required.

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 IAC O-ring on the IAC Valve (1).
2. Install the IAC valve to the throttle body.

Tighten
Tighten the screws to 2.3 N·m (20 lb in).

3. Connect the IAC valve electrical connector.