OK... MAybe I am out of line in saying this without being able to hear your vehicle...
The Crossfires I have PDI'ed (14 so far) have been among the quietest running vehicles I have had the pleasure of working on. So......
Unless your are some freaky noise consumed customer... (DOUBT IT!!!) I'd say something is not right and get a second opinion! You could contact DC directly and ask for a DC tech inspector to look at your CF if your dealer is blowing you off! If you have another 5 star dealer in your area, consider having them inspect your car. Beyond that, have you asked for your service maager in your dealer? You may be surprised at the help you receive if you get the manager involved.
Best of luck to you, and enjoy your CF!