Mechanics

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1996 GMC Truck • 2WD Automatic • 16,300 miles

Idles at 2 2and a half rpms instead of 1 1 half
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Shallon
January 18, 2011.



Make sure the throttle-valve closes. Clean the throttle-body and check the iac. Possible vacuum leak? Any applicable trouble codes? Something could be requesting a higher idle, like hvac? There could be other requests concerning the idle, hard to tell from here.

JDL
Jan 18, 2011.