I am looking at buying a 2003-2007 Chevy Silverado 1500 extended cab and im unsure which enigne would best suit my needs. Basically its going to remain a near stock truck with little to no lift, no big tires just a get me from point a to point b vehicle. Maybe a few appearance mods but thats it. I wont be doing any heavy hauling it would all be light loads and it wouldnt be hauling very often. Yet i would also like to get a decent number for gas mileage. im not sure if the extra liters in the 5.3 would affect gas mileage all that much or not but i do know there will be a little more performace from it which im not looking for perfomance as i am more of a conservative driver. please give me any input you may have. Thank you!