Being a chevrolet guy all my life, i can honestly say,,, nobody whom answers questions in yahoo answers would be able to tell you that, not even me, and ive been a mechanic since i was 5. Id ask the people whom sold you the wheels, and be that as it may youve got bigger wheels, make sure to upgrade your brakes to accomidate the larger wheel and tire, this is the number one killer of vehicles with larger rims. They are heavier and strain the brakes alot more, even just an inch. Frankly, you got the money for the rims, invest in a lift kit and put what you want on instead of guessing. Not to mention that you need a lift in order to not rub the wheel wells while carying a payload in the bed, many people forget about this when they upgrade tires and wheels. Whatever you put on, make sure to re-calibrate your speedo as the big tires will throw your mileage and speed off alot. You will loose low end torque for 4wd activities, plowing snow, and carying payload in the bed (things trucks were made to do) but you will gain a higher top speed.
