james83

Let me know what you find out. I too am getting pathetic mpg. About the same as you. Don't get me wrong, I'm not expecting anything phenomenal, but this is still below what these trucks should be getting I think. And if the recall fix makes it worse then I definitely want to know.

You guys seem to be getting way better MPG than I am. I do 90% city driving and have a lead foot . I'm averaging around 12-14 MPG. I use premium gasoline. Have the RC 2" level and 275/60/20 Cooper Zeon LTZ tires. Front air dam is still installed. For reference, when I dropped my truck off for the fire recall, they gave me a 2WD SLE loaner. DIC said average MPG was 16 something. I reset Trip A and while I had it, the average MPG was 14. Not much better than my leveled 4x4. So I think my poor MPG is more a factor of the driver... I don't how you guys can get 16-20. I would get run over driving like that around here.

Here is my 2014 Sierra SLT AT in Summit White with Jet Black interior. Current mods are RC 2" level and Cooper Zeon LTZ 275/60/20 tires. Planned mods are window tinting and a line-x bed liner.