Question about 2004 GMC Sierra 2500

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2004 duramax dual climate control the driver side blows cold

The driver side is blowing cold. the controls are of the slider type. passenger side temperature works ok

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Thankfully it was the drivers side controller! I found the temp control actuator located under the dash almost on the floor. I removed the four screws that held the cover in place then followed the wires to the actuator. removed the wiring harness then the two screws. replace with new part and heat works again!

Posted on Dec 25, 2008

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