Mechanics

GMC ENVOY ENGINE PROBLEM

2002 GMC Envoy • 97,000 miles

Car runs ok till I turn on heater or air. Then it bogs down and when sitting will die out. Can feel the drag on engine as driving. Also the compass never does the correst direction and the external temp guage in radio is always wrong
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Guest
October 23, 2012.




Any applicable trouble codes? Check/clean the idle air control valve. The pcm should up the idle with hvac on.


JDL
Oct 23, 2012.


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