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  1. 2008-2013 CTS General Discussion
    Hi All I have a 2012 CTS4 3.6L coupe, 115K, bought new, that idles rough at stop lights. It doesn't stall, but almost wants to. As soon as I hit the accelerator, she's fine. Any suggestions would be great! Also, what is the required GAP? Thanks!
  2. 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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