keys
I used the green keys and bilsteins on my 02 hd crew cab to level it up. Worked great However i'm not sure if just cranking my torsion bars up would have yielded the same results. I would try this first and if ride is too harsh put on keys. Also just go down to your chevy dealer and buy the green keys and new longer shocks. They are a lot cheaper than these kits advertised. Ride was firmer but more controlled. I think it has more to do with the shocks.
JMHO