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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.

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2010-06-25 18:22:01
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Q: Where is the iac valve on a gmc jimmy?
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