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My Yukon SLT idles high when I turn a/c button on
teesmith88
Member Posts: 1
My 1999 Yukon idle will change when I press the a/c button. The idle will go up for a about 2 seconds then return to its normal rpms. This only happens with the a/c button pushed in / on, this happens while in park and while in drive. I have replace the throttle position sensor and the idle air control valve and still have the same problem. If I turn the a/c button off and leave the fan blowing the idle runs at normal rpms without any change. At this point I am open to any suggestions.
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