Originally Posted by dline
my 04 silverado gets 11mpg going upnorth, shit, think something is wrong with it, yes it has 33" tires
my 11 charger RT 5.7L gets mid 20 mpg's very happy with it
Got just shy of 15 in my 02 with the 5.3 and with 285/75/16 (close to 33s) so with this based off my odometer, it was actually higher than that. If you have a 6.0 thats about right, i gave up checking my 6.0s mileage, got below 10 too often. I just fill the 35gallon tank and try not to think about it.