I have a 2006 GMC Sierra that driver side won't change to cold.

Asked by dbmcknghtd Jun 03, 2019 at 05:48 PM about the 2006 GMC Sierra 1500 SLE1 6.5 ft. 4WD

Question type: Maintenance & Repair

I purchased a new blend door reset it and still the drivers side stays hot while
passenger side is ice cold. Than I took the actuator out and manually turned the
drivers to cold but it moves back to hot once I turn my truck off. This is the
second blend door actuator I put in an reprogrammed.  Is there another
actuator that is  moving  that I'm not finding?

2 Answers

This happened to my 05 Sierra. I own a body shop and our guys fiddled with it and it started working on drivers side. Not sure what they did but now I'm thinking it will repeat.

I did reinstall actuator and its working for now. I know it will stop working because it only last until I switch it to heat in fall!

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