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There is a clicking or knocking from behind the dash? Blend door actuator?

Tiny
ART ROBITAILLE
  • MEMBER
  • 2012 CHEVROLET SILVERADO
  • 4.8L
  • V8
  • 4WD
  • AUTOMATIC
  • 95,000 MILES
I'm getting the clicking sound, more like banging, but I read a motor replacement article that mentioned a plastic gear set that could be broken. How can I check this so that I don't replace the wrong part?
Monday, June 8th, 2020 AT 7:53 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

There are several actuators. Do you know which one? Try changing modes or temperature and see if the noise changes. That will help narrow the one that is making noise. this guide can help and video can help.

https://youtu.be/Eqf-H3COtSo

and

https://www.2carpros.com/articles/replace-blend-door-motor

Check out the diagrams (Below). Let us know what happens and please upload pictures or videos of the problem.
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Friday, February 12th, 2021 AT 1:37 PM
Tiny
ART ROBITAILLE
  • MEMBER
  • 2 POSTS
I would have to say the first view. The sound is under the glove-box.
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Friday, February 12th, 2021 AT 1:37 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
With the noise happening, put your hand on it and see if you can feel the ticking.

That will confirm it.

Roy
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Friday, February 12th, 2021 AT 1:37 PM

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