Silverado 1500 2WD V6-4.3L VIN X (2004)
CLEANING AND INSPECTION PROCEDURE
Clean the IAC valve O-ring sealing surface, pintle valve seat, and air passage.
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Remove any excess carbon deposits with a small amount of carburetor cleaner on a parts cleaning brush. Follow any instructions on the cleaner
container regarding cleaner usage.
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Do not use a cleaner containing an extremely powerful solvent such as methyl ethyl ketone.
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Shiny spots on the pintle and seat do not represent a bent or misaligned pintle shaft.
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If heavy deposits are present in the air passage, remove the throttle body for a complete cleaning.
INSTALLATION PROCEDURE
1. If installing a NEW IAC valve, measure the distance between the IAC valve pintle and the mounting flange. If the distance is more than 28 mm
(1.10 in), use finger pressure, and gently push in the pintle.
2. Install a NEW IAC valve O-ring seal.
3. Lubricate the IAC valve O-ring seal with clean engine oil.
4. Install the IAC valve and O-ring seal.
