Step 2: Disconnect the shock and swaybar from the axle. For the shocks, remove the bolts at the bottom. For the swaybars, it will be easier to remove the bolt up top.
Step 3: Lift the rest of the truck off the axle and/or lower the axle.
Step 4: Next I went after the air system itself, dropping the compressor and tank, disconnecting the wires, and cutting the airline feeds to both airbags as well as the tire inflator in the bed.
I just taped up the wiring harness and zip-tied it up under the bumper.