Having problems with your 2004 GMC Envoy ?

Rear heat blows cold air

\015 My 2004 Envoy XL rear will not work. The blower works and cold air comes out but no heat with the front or rear controllers. I suspect it is the blower resister. Where is the blower resister located and can this be the cause of the problem?\015 Posted / edited by AnonymousUser on : 18-10-2021

Answers :

One of the second heater core lines is clogged.
Repair Help & Product Troubleshooting for 2004 GMC Envoy

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