2002 Gmc Envoy Car Runs Till Turn On Heater Air Bogs Down Sitting Will Die

2002 GMC ENVOY
97,000 MILES
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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
Oct 23, 2012 at 2:41 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Any applicable trouble codes? Check/clean the idle air control valve. The pcm should up the idle with hvac on.
Oct 23, 2012 at 4:00 PM
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