tRe dleplace IAC Valve
The IAC valve is mounted on the upper intake plenum (manifold)
The IAC is located on the throttle body. Simply unplug the dirty IAC and clean or replace the IAC.
The location of the IAC valve depends on the kind of fuel injection system you have. On the Vortec V6 (93+) it's right on top of the air intake in front of the throttle valve. If you follow the air intake tube to the motor, the IAC valve will be in the intake manifold right where the air tube meets the manifold. The wiring for the IAC valve comes around behind the throttle cable bracket and plugs into the IAC valve.
It's under the throttle body. To get to it, you'll need to remove the throttle body and flip it upside down. The IAC valve is mounted by two screws to the throttle body, and it has a gasket that you will need to replace if you remove the IAC valve, so make sure you have a new gasket on hand if you intend to take off the IAC valve.
check for vacuam leaks if non found replace iac valve
On the engine valve cover on driver side.
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The IAC is located on the throttle body.
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