I'm sure you've seen it, the dreaded chevy rake, where the truck leans to one side. Mine did and it really use to piss me off. A buddy of mine showed me an easy fix, What we did was cut a tire just above the bead and up into the sidewall the width of the leaf springs, the piece of tire is wedge shaped,thicker towards the bead side, you will need 2. Next we jacked up the truck by the frame to relieve the tension on the springs on the side of the truck that was sitting low then wedged the piece of tire in between the bottom two springs. One in frount and one in back. You can adjust the height by moving the pieces of tire in and out. Work great on my truck. P.S. mine is a 2 wheel drive. Hope this might be of help to someone.