Have 2003 Chevy 2500HD 2wd Crew Cab. 6.0 gas engine. My Goal is to improve the ride of the truck. It is very stiff. Would also like to lower the truck a little, possibly 2-4 inches, especially the rear because it is difficult to load and level for pulling my camper. Towing my camper about 5-6 times a year is the heaviest hauling I do. Camper is not that heavy. Otherwise a daily driver. I have sought advice from 3 alignment shops in my area along with looking at coments on the web. I have purchased lowering shackles for the rear but have not installed them yet. My plan is to purchase tires with lower load range than e which the truck currently has. Have also lowererd the air pressure in current tires which has helped some. Experimented with lower load range tires which does help a little. Alignment shops say that adjusting the bolts on the torsion bars won't help me soften the ride much. All three shops are not familiar with lowering keys (which are rare since most people are looking to raise the truck). However, I have found a couple places on line that sell adjustable keys for lowering. One alignment shop said to try taking out the overload spring on the rear. Noted this should improve ride of the whole truck without sacrificing performace since I do not pull really heavy loads. Attempted to do this but could not get out the bolt that holds the spring stack together on top of axle. Would this really help? Can have a local shop remove them for me. I don't think lowering and leveling the truck will be a problem, but should I purchase these lowering keys? All three alignment shops advised against them. One shop noted that replacing shocks might help. Primary goal wold be to improve the ride. I know that older GM 3/4 trucks with coil springs seem to ride better and that's what I am looking for. Thanks to anyone who has hands on advice in this area.