Question about 2004 GMC Envoy
Try setting all switches and controls to their full CCW or OFF positions. Then disconnect the battery for about 10 minutes, reconnect battery and don't touch any of the HVAC controls for a few minutes. The system will recalibrate itself during that time. If this does not work, you may need a professional service tech to diagnose it.
Posted on May 09, 2011
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Posted on Jan 02, 2017
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