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Ask GM Tech (Cam) Your Own Question

GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 27664
Experience:  GM Grand Master Technician 2007. 11 years experience.
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Whats making this clicking sound in my 2005 trailblazer

Resolved Question:

Its making a clicking sound when the key is turned on or is first started.Its coming from the back passenger side panel by the third row seat ,but it only last for a few minutes.
Submitted: 5 years ago via CarComplaints.com.
Category: Chevy
Customer: replied 5 years ago.

2005 Chevrolet 05 trailblazer 4200 vortex


Already Tried:
leaving the back air/heat of but now it just keeps doing it.
Expert:  GM Tech (Cam) replied 5 years ago.
WelcomeCustomer Is your Trailblazer the EXT version with rear air suspension? If you can. Please post the VIN.
Customer: replied 5 years ago.
When i turn the key on or even start the vehicle its making a loud clicking,thumping sound ,they are about a second apart ,its coming from the back passenger side of vehicle below the side glass .When it first started i could turn the rear heat/ac fan controll off and it would stop but now it does it regardless,but it only last for a minute or two.
Expert:  GM Tech (Cam) replied 5 years ago.
Ok. That sounds like the heat door actuator may be faulty. I would remove the panel and disconnect the door actuator. If the noise is gone and the door turns properly, then replace the actuator.
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 27664
Experience: GM Grand Master Technician 2007. 11 years experience.
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