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Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Knock Knock in rain

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Old Mar 4, 2020 | 06:23 PM
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  #11  
RKSmith163's Avatar
Senior Member
Joined: May 2008
Posts: 834
From: Blacksburg, VA
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I get it sometimes after running through a carwash. I think it has something to do with the Sunroof drains. I do get buzzing from my A Pillars in a crosswind. Two separate issues.
 
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Old Mar 5, 2020 | 09:17 AM
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  #12  
TAINTER's Avatar
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Joined: Sep 2008
Posts: 6,126
From: SE Michigan
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Does it sound like popcorn popping?
 
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