Question about GMC K2500
You need to clean the idle speed control valve and the throttle valve, they are most likely sludged up, use carb spray, do it with the enginge at high idle speed, after you are done disconnect the batt. for 5 min. and the reconnect, drive a few miles and your problem should go away.
Posted on Sep 04, 2008
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Posted on Jan 02, 2017
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