[BarryGMC]

The thing you are not considering is your tires. I know half of the problem is the tires under rolling and deflecting. The stock bias 4 ply 15 and 6 ply 16 inch bias tires had a much stiffer sidewall. The p rated 15 inch radials are very thin in the side wall. Those cokker wide whites are not good for anything but cruising. I throw those away on full size gm cars all the time. Cooper or BFG tires are way better. I NEVER RUN P RATED tires on a truck. Lt 225 75 15 tires from anybody will feel better than a p tire. Put a 60 series 25 inch tire and your truck will feel like a slot car.