2005 Chevy Express All air comes out defrost vent

Tiny
GUSTINGANG9
  • MEMBER
  • 2005 CHEVROLET EXPRESS
  • V8
  • 2WD
  • AUTOMATIC
  • 76,000 MILES
No matter what setting we put air on (defrost, vent floor), all air comes out defrost vents. There is also a small air hissing sound inside van.
Sunday, March 8th, 2009 AT 3:42 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Find the hiss, that will be a vacuum leak, plug that hose back in, or replace the leaky controller, and it will be fixed, vac leaks make the system defualt to defrost registers.
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Sunday, March 8th, 2009 AT 4:03 PM

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