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2012 cts 4 coupe
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  1. 2008-2013 CTS General Discussion
    First off, I’m the only owner of this car (2012 CTS 4 Coupe, 86k) & never ever skimped on maintenance, etc. Second, I know zero about cars so please forgive my ignorance as I describe this issue. Just today, I noticed a loud vibration, almost purring or roaring as I accelerated above 10mph...
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