Mechanics

GMC ENVOY DEFROSTER PROBLEM

2003 GMC Envoy • 131,900 miles

I have a 2003 envoy and the motor is a 4.2. When I turn my defroster on the motor idles way down and sometimes dies

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Guest
March 25, 2013.



Sounds like a idle air control valve that is not functioning.

Roy

ASEMaster6371
Mar 25, 2013.