I purchased a 2012 Red CTS-V off the lot of a Houston area Cadillac dealer. Shortly after purchasing the car, I heard a rattle when accelerating on to the highway. I immediately set up an appointment to the dealer to have it looked at. When speaking to the service advisor, he asked if I put "regular" gas in the tank (off to a REAL bad start). I stated I knew about the corvette pushrod technology and the eaton supercharger screwed on the engine...
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Most reported 2012 Cadillac CTS-V problems