How To Decrease Noise? - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Engine Tunes/Mods

Engine Tunes/Mods Performance Engine Tuning/Engine Modifications

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  #1  
Old 01-21-2019, 07:49 PM
Rockie46 Rockie46 is offline
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2003 Chevy TrailBlazer LT
Dark Gray Metallic 4.2L I6 4X4
Join Date: Apr 2016
Location: Alabama
Posts: 10
How To Decrease Noise?

I've looked around but i couldn't find any specific threads about parts or adjustments that can help with vibration and sound (I'd gladly read any if anyone knows where some might be). I've been told before that replacing the motor mounts can help with vibration as they get worn overtime. Curious if anyone's done this to there own trailblazer. I would also like to know of any ways I can dampen the overall sound of the vehicle. When i first bought my 03 it was much quieter inside but now it just seems like alot of sound and air is seeping through. I'm looking for suggesting on improvements or parts i can replace that can help with either of these two area. Any help or advices would be greatly appreciated.

03 Trailblazer 175k miles. Bunch of new parts added, most recent cat-conv.
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  #2  
Old 01-22-2019, 09:25 AM
Ponvoy Ponvoy is offline
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2004 GMC Envoy SLT XUV
Carbon Metallic 4.2L I6 2WD
Join Date: Sep 2018
Location: Houma, LA
Posts: 27
I've changed both the motor mounts and my transmission mounts and it helped with the vibrations big time. If you decide to change them be sure to use OEM mounts ONLY. Aftermarket mounts are trash and will cause vibrations.

More importantly when does it vibrate? and under what conditions? The answer to these questions could help pin point the issue.
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Old 01-24-2019, 03:50 AM
LoloMike LoloMike is offline
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2007 Chevy TrailBlazer LT
Graystone Metallic 4.2L I6 4X4
Join Date: Apr 2016
Location: Lolo, MT
Posts: 6
I had vibration and noise in my 07 TB and it was the front right wheel bearing. I replaced both just to be safe and "problem solved".
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