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How is the front assembly under the steering wheel removed to access HVAC actuators?

Tiny
RENOHOPPER
  • MEMBER
  • 2006 HUMMER H3
  • 4WD
  • AUTOMATIC
  • 124,000 MILES
How to gain access to the HVAC Actuators?

Thanks
Friday, January 7th, 2022 AT 8:43 AM

5 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The knee bolster comes out after removing a few bolts.

Which actuator are you having the issue with?
Then blend door or the mode door actuator?

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

I have attached a few diagrams below showing the procedure.

Please let me know if you have any questions.
Thank you.
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Friday, January 7th, 2022 AT 1:55 PM
Tiny
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Thank you SQM!
I know what the correct term "Knee Bolster"!

I was planning to replace all three. I have a ticking noise that starts when the ignition switch is on and ends when it is turned off. The fan blows what appears to be recirculated air and only through the defrost vent. The other two dials have no effect on the air temperature or circulation.

Thanks for sharing the link to the article.

Thoughts about my approach?

Thanks again!
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Saturday, January 8th, 2022 AT 11:34 AM
Tiny
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You are welcome.
So, the air only blows from the defrost vent right? Which will be the mode door actuator.
When you say the other two dial not having any effect on the temperature, do you mean the temperature stays hot or cold regardless of the setting? As that could be the blend door actuator.

Keep in mind that the recirculation actuator is under the dash, and it will require removal of the panel. So, if there is a recirculation issue you might want to keep the other actuator in mind.
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Saturday, January 8th, 2022 AT 12:41 PM
Tiny
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Correct air only blows from the defrost vent.

The air temperature of the air from the defrost vent matches the temperature within the vehicle. It is neither hot or cold.
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Monday, January 10th, 2022 AT 10:43 AM
Tiny
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  • 6,383 POSTS
Gotcha. Let me know how it goes after replacement.
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Monday, January 10th, 2022 AT 11:41 AM

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