Question about 2007 Chevrolet TrailBlazer SS

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Air will blow out of floor vents and defrost vents but not air vents

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  • 18 Answers

Vacuum hose for air vents is not connected. These black hoses should be accessable by feeling under the dashboard. The hose just slides onto the air vent intake. Hope this helped.

Posted on May 03, 2010

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6ya6ya
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Posted on Jan 02, 2017

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flapjack937
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SOURCE: air will not blow out of panel vents

vents are blocked so air is diverted to other vents, check and clean if necessary

Posted on Aug 14, 2008

  • 37 Answers

SOURCE: Heat wont blow through heater or defroster vents

The door in the heater box is most likely stuck. It is located under the dash on the passenger side

Posted on Dec 06, 2008

  • 20 Answers

SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Posted on Feb 23, 2009

  • 37 Answers

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Posted on Mar 13, 2009

  • 432 Answers

SOURCE: All Air Conditioning blows our the defrost vents

Some thing you could look at would be this. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold.
With a cold engine,look for a skinny vacuum hose that runs from the intake toward the fire wall . It should be going inside the cab and connecting to the A/C vent control.Some times the hose becomes disconnected or splits or cracks due to heat under the hood.
Thats usually the trouble.
I hope this helps you.

Posted on Oct 06, 2009

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