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2007 sierra automatic climate control issues

1499 Views 7 Replies 4 Participants Last post by  black07sierra, 
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Truck is new body style 07. Has the auto climate control. Every now and then ab quits blowing from main vents and goes to defrost. Only way to make it go back to main vents is to shut truck off and I guess it resets itself. But in a day or two it will do it again. Anyone else having these issues or know what it is?
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GM Customer Service
Have you brought this to the attention of your local dealer? I can also look into this for you with your VIN. Please feel free to keep me posted via private message either way. Thank you.

Tricia, GM Customer Service.
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