Question about 2002 GMC Yukon XL

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2002 Yukon XL Denali Problem: When idling, goes below 500 RPMs, spits and sputters at idle. No check engine light, spark plugs are one year old. Could it be a sensor??

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  • Anonymous Mar 28, 2014

    service engine light comes on and then goes off

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Most sensors will trigger the check engine light, however the TPS(throttle position sensor) or EGR Valve(exhuast gas recirculation valve) could be potential causes. Does this problem only occur at idle? Is the idle normal in park? Let me know and I can try to assit further.

Hope this helps

Posted on Jun 27, 2008

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Yes it only happens when it's cold and in park

Posted on Nov 21, 2013

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