Welcome to the site and the "new" truck. Ain't nuthin better than a duramax!!!! I have an 01 CC Dually with the older Hypertec (01-04) and find my best miliage on level 2 (70 hp) and running about 57 mph on the interstate I get Just over 18 mpg and drive like an old man. OH, I am on old man!!! Love my diesel!!!!
Good luck and fun driving. 
__________________ duramax-rob
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2001 Chevy 3500 CC Longbed Dually 4X4, 6.6 Duramax, Hypertec Programmer, Magna Flow 4" Exhaust, 5th wheel hitch, Jayco 32' 5th Wheel  Some's good, More's better, Too much is just enough!!!! |