Drop the hitch, jack ass end up tires 2' in the air, jack stands under frame under cab, let back end down, need to completely unload rear suspension but still hold it with floor jack. Removed lower shackle bolt, can be a slut depending if rust is there, use pb blaster, then remove top shackle bolts, raise floor jack until leaf eyes hit the bottom of the bed, reach over frame rail and remove upper stock shackle bolts, reassemble in reverse order.