Question.. Increasing payload on Silverado 2500HD Diesel

There are E rated tires that approach 3500lbs +/-. Usually going bigger which then compromises stopping ability. 19.5" tires/rims are stronger but sacrifice sand ability. Before adding a leaf check out Torklift Stable Loads. Add Stable loads before airbags. The airbags may not be necessary. Airbags tend to unload the suspension.