Quote:
Originally Posted by 2010_BumbleBee
I keep noticing a vibration and change in exhaust sound at low throttle at different speeds. Seems like it's bogging down. I have the oil leaks too; got to get those fixed. I'm also having a thumping noise when you go over a bump, sounds like something loose... We will see what the GM dealer says... NOT looking forward to this trip!
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Hopefully not "operating as designed"