1999 CHEVY S-10

  • Tiny
  • #1
  • 1999 Chevrolet S-10

Heater problem
1999 Chevy S-10 4 cyl Two Wheel Drive Manual 135000 miles

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

Do you
have the same problem?
Sunday, October 25th, 2009 AT 4:05 PM

1 Reply

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 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.

Was this
Thursday, November 12th, 2009 AT 1:48 PM

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