Headliner vents not working

[bjde0b]

I bought my wife an 08 Yukon and we cannot get the vents in the headliner to work. We have tried both the Aux and rear controls without success. Has anyone else experienced this? Any thoughts on how to fix it?

 

[R_Sharpe]

I have the same issue in my '07 Tahoe. I'm going to take my truck to a GM dealer when my school has fall break. I originally thought that maybe it was a blown fuse, but IDK. If you find the problem, be sure to post here though.

 

[bjde0b]

I figured it out. Run your rear A/C at full blast and see if the headliner gets cold.

If that is the problem, do this.

Pull the pillars in back and the passengers side where the seat belt is. There a flap that the duct is supposed to go in to the headliner. Fixed.

 

[domin8]

Are the rear controls turned on when you have pushed the front AUX button on? That worked for mine.

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