Question about GMC Envoy XL

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2003 gmc envoy, 5.3 liter 4x4 auto. vehicle stalls when ac engages,when not on idles fine. please advise

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Hi, it may have a sticky idle speed control motor. Try cleaning it with carb cleaner and a rag, also clean out the throttle body the same way. You may have to replace the IAC motor if it doesnt fix it, also use the carb cleaner to spray around the intake looking for vacuum leaks, if you spray any the engine idle will change...

Normally ckeaning the throttle body would fix the problem...

Posted on Mar 19, 2011

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Posted on Jan 02, 2017

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