There probably isn't much you can do. The hd trucks ride like covered Wagons. You could get lighter spring rates and softer socks and run your tires on the lower end of the normal range but all of that will compromise your load capacity and towing. Springs rated for more weight, even air Springs, are inherently stiffer to compensate for the added weight
If Guns kill people, then pencils misspell words and spoons made Rosie O'Donnell fat...