1999 chevy s-10 pick up

1999 CHEVROLET S-10
164,000 MILES • 6 CYL • 4WD • AUTOMATIC
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JACKKOMER
  • MEMBER
  • 2 POSTS
air vents in heat/ac system stay in panel position, no defrost or floor air heat and ac fine
Jan 27, 2011 at 8:18 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check your actuators on the heater. they may not be getting power. they are vacuum posered so you may have a vacuum leak. here is the diagram for it.
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Jan 28, 2011 at 5:55 PM
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JACKKOMER
  • MEMBER
  • 2 POSTS
thanks hmac300, schematic came in handy. found vaccum leak under hood. Didn't need to dismantel dash. OOPS ! Did learn a lot and replaced some burned out bulbs behind dash.
Jan 29, 2011 at 4:07 PM
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