I think you will be overloaded on your rear axle weight rating and possibly your tire rating. Hard to really know without knowing more about your truck and options. Look inside the drivers door jamb at the label. It should give you the RAWR (rear axle weight rating). Read your tire sidewalls and they will have the maximum weight for each tire. Give us that info. Even loaded lightly to 18,000, I would not do it. Air bags don't increase your tire capacity. Now if your willing to change to 19.5" wheels and tires. It may be doable. We just don't know enough about your truck. We need the RAWR and tire info. Good luck.
