Installation Procedure

Fig 1: Measuring Distance Between IAC Valve Pintle & Mounting Flange

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Use an identical part when installing a new idle air control (IAC) valve. The IAC valve pintle shape and dimensions are designed for specific applications.

On a new IAC valve, measure the distance between the IAC valve pintle and mounting flange. Use finger pressure to slowly retract the pintle if the distance is more than 28 mm (1-1/8 in).

Fig 2: View Of IAC Valve & O-Ring Seal

Courtesy of GENERAL MOTORS CORP.

Lubricate the IAC valve O-ring with clean engine oil.
Align the flange holes with the mounting holes on the throttle body assembly.
Insert the IAC valve through the O-ring into the throttle body assembly.

Fig 3: View Of IAC Valve Screws

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: The screws used to attach the IAC valve are coated with thread locking adhesive. Clean the attaching screw threads and apply thread locking material GM P/N 1052624 or equivalent.

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

Fig 4: View Of IAC Valve Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Connect the IAC valve harness connector.

Fig 5: Air Intake Tube Routing

Courtesy of GENERAL MOTORS CORP.

Install the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
Perform the IAC Reset procedure:
1. Turn ON the ignition, with the engine OFF, for 5 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Start the engine and check for proper idle speed.