Question about 2007 Chevrolet TrailBlazer SS

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Air will blow out of floor vents and defrost vents but not out of the air vents in the dash on my 2002 chevy trail blazer.

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  • Chevrolet Master
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Probably a loose or broken vacuum line under the hood somewhere. With the engine running, wiggle all hoses around and listen for a hissing. Check the one that goes to the vacuum pot that bolts to the under side of the hood. There is also one that runs just on the left side of the air breather that is prone to cracking from heat.

Posted on Jul 14, 2010

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