Only blows air from upper dash vents can't change but can switch rear on and off.
Dec 28, 2018 at 7:03 AM
Blend door actuator
2011 GMC ACADIA
RALPH BAKER
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Good morning,
It sounds like you need a mode door actuator as that controls the movement of the mode door. this is a very common failure.
https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position
It is located behind the glove box on the passenger side.
Roy
It sounds like you need a mode door actuator as that controls the movement of the mode door. this is a very common failure.
https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position
It is located behind the glove box on the passenger side.
Roy
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Dec 28, 2018 at 8:44 AM