Idle air control, (IAC) plug test
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Locate your IAC on the throttle body. Remove the plug by lifting on the tab and then wiggle while pulling on the plug. Pull on the plug, not the wires.
![](https://www.gmforum.com/howto/test-pics/PA010009.JPG)
Look for any corrosion or damage to the plug or terminals. Clean or repair if needed.
Look for any corrosion or damage to the plug or terminals. Clean or repair if needed.
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