Quote:
Originally Posted by Jazzzed
A shot in the dark... but to me it seems like something is rattling/rubbing related to your exhaust. Thus the reason a mid-body vibration can make it occur. The actual rattling of it might be closer to the engine bay and downpipes though. Sounds kind of heat shield-ish in the first video.
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The shop foreman at the dealership I work at (not Chevrolet) said the same thing. I got under it not too long ago and I couldn't find any place where the exhaust could be making any contact with anything that it shouldn't be. I'm going to go out and wiggle it around to see if I can recreate the sound. Thanks!