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2003 CHEVY SILVERADO

  • Tiny
  • fsewell
  • 2003 Chevrolet Silverado

I have a 2003 chevy silverado 5.3liter it has 80,000 miles. My question is when I turn on the air it always blows out the defrost. Will not stay where the control knob is. How do I fix this?

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Sunday, September 30th, 2007 AT 7:16 PM

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  • Tiny
  • BMRFIXIT
  • Expert
  • 19,553 posts

Is it electronic if yes
need a motor
If not check you vacuum hoses

good luck

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Sunday, September 30th, 2007 AT 7:47 PM
  • Tiny
  • dennyp
  • Expert
  • 1,873 posts

I think you are having an issue with the mode door actuator. If you have a good scanner, you can compare the mode actuator desired counts to the actual counts. This will tell you if you have an actuator problem.

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Sunday, September 30th, 2007 AT 10:02 PM

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