Back seat/ wall rattle !!!!!!!

Stow your rear seat in the upright position and the noise goes away. There is a video on you tube...it is the rear HVAC louver behind the rear seat. Need to pull rear seat per the video but real fix is unclear/unresolved.

I have it as well. I am empty nester....I put my lunch and work bag in the under seat storage compartment and my rear seat is stowed 90% of the time. Note...I just hear it on my driver side...not passenger. I will not take it apart to repair mine and others have indicated that GM dealership will not support under warranty etc. Good luck with your next steps....hopes this helps.
 

Stow your rear seat in the upright position and the noise goes away. There is a video on you tube...it is the rear HVAC louver behind the rear seat. Need to pull rear seat per the video but real fix is unclear/unresolved.

I have it as well. I am empty nester....I put my lunch and work bag in the under seat storage compartment and my rear seat is stowed 90% of the time. Note...I just hear it on my driver side...not passenger. I will not take it apart to repair mine and others have indicated that GM dealership will not support under warranty etc. Good luck with your next steps....hopes this helps.
For a 2 week old truck they better….. and you are correct if I stow it up it reduces it by 90%
 

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