C 1500 Truck 2WD V6-4.3L VIN W (2001)
5. Remove the IAC valve and O-ring from the throttle body assembly.
CLEANING AND INSPECTION PROCEDURE
1. Clean the IAC valve O-ring sealing surface, pintle valve seat, and air passage.
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Remove 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 mis aligned pintle shaft.
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If heavy deposits are present in the air passage, remove the throttle body for a complete cleaning. Refer to Throttle Body Cleaning Procedure.
IMPORTANT: Do not reuse the original O-ring.
2. Replace the IAC valve O-ring.
INSTALLATION PROCEDURE
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.
1. 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).
