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Low frequency growling noise

1522 Views 3 Replies 3 Participants Last post by  jlkans, 
J
My 2008 CTS AWD has developed a low frequency growling drive line noise most noticeable from 20 to 45 mph. Has 40000 miles on it and this problem has developed within the last 1000 miles. Is there a service bulletin that addresses this problem ? Getting ready to take it to the dealer and would like any information available that will assist them in correcting this problem.
Thanks in advance
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D
I've noticed mine is doing this too lately. I looked under the hood and while I'm not sure what the belt is, the belt which is front most on the engine is shaking a bit harder than it had been. This might be the cause of your noise.
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