Defrost vents only working

2010 CHEVROLET EXPRESS
94,264 MILES • 2WD • AUTOMATIC
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JRUDD94
  • MEMBER
  • 3 POSTS
A/C and heating only come out of defrost vents the dial still works just won’t move to main or floor vents.
Aug 30, 2019 at 8:22 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
The actuators are vacuum controlled. Check the tank under the hood and make sure the lines are hooked up. Check out the diagrams (Below). Let us know what happens and please upload pictures or videos of the problem.
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Professional Diagram for 2CarPros Members
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Aug 30, 2019 at 10:26 AM
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Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.