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Old 05-15-2019, 12:35 PM   #1
protovack
 
Drives: 2019 2LT 2.0T M6 Riverside Blue
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Question 2019 trunk rattle, dealer can't figure it out

Audible at speeds above 55mph, sounds like a fluttering, gets worse the faster you go, like the more turbulence and wind noise, the worse it gets. It sounds like its coming from outside the body of the car, but its much louder if you drop the rear seat. Doesn't seem to be coming from the rear deck lid.

Strangely, turning the HVAC system fan on seems to decrease it substantially, even on fan speed 1. So putting even a small amount of positive pressure into the cabin partially fixes it.

Dealer tech told me he can hear the sound and that its "just road noise".
I told him I've driven several other 6th gen camaros and never heard this noise, and the noise is more audible on smooth pavement because the actual road noise isn't drowning it out, so how could he call it road noise? His response was take it to a different dealer that knows camaros better. They are a small department in rural area that "deal mostly with trucks." He says GM will not pay them enough to justify an extended diagnosis session with the car.

Anyone ever have this sound or know a fix?
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Old 05-15-2019, 03:57 PM   #2
Soleil

 
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Is it when one window is down? If so, have a look here. Interior Whistling Issue...Found the Cause
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A car is fast enough, if you fear to unlock it in the morning." (Walter Roehrl)
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Old 05-16-2019, 11:37 AM   #3
ugxvibe
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The dealer tech needs to compare your car to a 'like' vehicle on the lot. If they both do it its either normal or something GM will address at some point. As a GM technician, re-engineering cars is kinda difficult. Try putting masking or painters tape along the edges of the rear glass closing the gaps between the body and glass, including the line along the trunk. See if it changes.
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Old 05-16-2019, 11:56 AM   #4
VinnAY
 
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The best thing ive done to track noises which can be deceptive to their originating location is too put a friend in the backseat and take them for a drive and let them pinpoint it. Or put them behind the wheel and you get back there and probe around.
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