Question about 2005 Chevrolet Silverado

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All Air Conditioning blows our the defrost vents

All air blows out the defrost vents no mater where the setting is. No air comes out the dash vents into the cab or out the floor vents.

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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

  • jim whaley Jul 07, 2012

    It was the vacuum I now have air

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