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I traded a 2011 GMC Sierra 5.3L V8 WITHOUT Active Fuel Management (Cylinder Deactivation), 4WD, Lifted w/ 33s, and from 0 miles to 22,000 miles, it never gave me this low of mileage, with a larger motor, larger tires, a lift, and more weight. It's a hard cup of Kool-Aid to drink to believe that...

I'm in Mississippi right now, so yes, the AC is in use, and the state requires 10% ethanol in all fuel here. I understand it's only a few MPG's off sticker, but my thought process was that: a) It's partially highway, so 15 shouldn't be the base metric b) The EPA updated the testing method to...

Hello, all. New here. I just bought a 2012 KK (4WD, Automatic). I've been getting terrible mileage, and I'm wondering if it's normal for a new KK, or if I have an issue. My four AVG MPG since new (as calculated by mileage to the tenth and the gallons on the pump) are: 13.25 14.01 13.21...