1999 Chevy S-10 dash board vents

1999 CHEVROLET S-10
275,000 MILES • 6 CYL • 2WD • AUTOMATIC
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REDHEAD64
  • MEMBER
  • 3 POSTS
air in coming out of the vents, without the controls turned on
Oct 13, 2009 at 12:46 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
I believe you are looking for a vacuum leak in this situation. The vents are actuated by vacuum and if thre is a leak, all types of things can happen.
Oct 17, 2009 at 9:47 AM
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