2003 Chevy Blazer heater vacuum line problem

2003 CHEVROLET BLAZER
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MPW995
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Heater problem
2003 Chevy Blazer 6 cyl Four Wheel Drive Automatic

My Blazer's climate control is not working. I can hear a vacuum leak from behind the vent selector switch. I took the vacuum switch out and noticed it was covered with oil. With the car running and the vacuum lines off the switch it is a very quiet leak but when I plug it back into the switch, it gets a lot louder.

I only have air blowing from the dash vent. It will not switch over to floor or defrost.

Any suggestions???
Apr 17, 2009 at 7:18 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
If the sound is louder when you attach the switch, it sounds like it needs replaced.
Apr 20, 2009 at 5:23 PM
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