1999 Chevy S-10

MEMBER
1999 CHEVROLET S-10
4 CYL
2WD
MANUAL
135,000 MILES

Air blows thru dash vents only. Will not blow thru defrost or floor vents

Sunday, October 25th, 2009 AT 4:05 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

You are looking for a vacuum leak. The vent doors are actuated by vacuum. Check under the dash and the hood for leaks. Many times, you will hear a hissing sound where it is leaking from.

Let me know what you find.

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1999 Chevy S-10

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