04 9.3 400hp ?
I have a 05 CC allure 430,heavy 37,000# plus tow a trailer,it seems to be down on power to me,plus don't get but 5mpg on a great day.It has screen in dash with info it never reads higher than 6hundred something on torque and 2hundred something on hp no matter what.All other info seems correct? Took to cat dealer got a new air filter which I believe didn't need and a oil pressure sensor and didn't change anything running wise! They say it all checked fine??? How is power on most? Mine wont go up a good grade at speed limit most times not towing.
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