A Couple Questions Regarding Mods & Fuel Mileage

[SMW]

I currently have a 15 Silverado that is leveled on 275/60/20 Nitto Terra Grapplers with factory wheels. I am wanting to go to a 3.5" front and 2" rear lift. If I stay with the current tire/wheel setup, will I notice much mpg loss with extra lift?

 

If I add lift, I may go to a true 33x12.50x20LT tire. Any idea of mpg loss there?

[O_J_Simpson]

Sure you will. I would say 2-4 MPG loss depending on your right foot action.