2007 trailblazer noise - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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  #1  
Old 09-08-2018, 04:36 PM
louigie's Avatar
louigie louigie is offline
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Join Date: Sep 2018
Posts: 2
Unhappy 2007 trailblazer noise

Hello,
I have a 2007 trailblazer that is making a growing noise from behind the dash. I disconnected the blower fan motor and it still makes the noise when you first turn the key on. It seems to be coming from above where my radio is in the vents above. Anyone run into this noise and if so how did you fix it. it is aggravating me
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  #2  
Old 09-08-2018, 06:27 PM
Akrich Akrich is offline
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2005 Chevy TrailBlazer LT EXT
Dark Gray Metallic 4.2L I6 4X4
Join Date: Jun 2018
Location: Pittsburgh, PA
Posts: 34
Is the airflow changing when you hear the noise. I am wondering if it is an actuator making the noise.
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  #3  
Old 09-08-2018, 08:41 PM
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louigie louigie is offline
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No no volume loss
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  #4  
Old 09-08-2018, 11:17 PM
mddombrowski mddombrowski is offline
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2006 Chevy TrailBlazer LT EXT
Summit White 4.2L I6 4X4
Join Date: Jan 2017
Location: Charlotte, NC
Posts: 145
Try pulling the main fuse for the HVAC module. The only other thing that moves in the dash is the blend door actuators.
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