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Hello, I have a question for anyone that might be able to help me please. I have a 2001 tahoe and when I accelerate normally I hear this annoying vibration that sounds like it could be a heat shield or something vibrating. Anyone know what this is?
 

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It is the heat shield on your muffler, seen this many times. You can cut it off or GM had big 'hose' clamps to put around themuffler to stop it.
 

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It might be the cover on the cat too mine did that
 
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