Its super EZ:
1) Get the system discharged at LR or an AC shop
2) Take out the fascia that has the blower vents in it. Screws are behind the vents.
3) Unplug wiring
4) Disconnect hoses under hood - ensure you use a wrench on each side of all fittings.
5) Remove underdash blower/condensor, receiver/drier (the little canister attached to the frame), compressor, and evaporator/fan in whatever order you prefer.
6) Plug all the openings to the various hoses and parts to keep them nice and clean - whoever you sell it to will appreciate it. Also, you'll need to plug them up for long term storage if you just want to keep the system in case you sell the truck.
7) You'll want to get a new fuse box cover (the original is cut down to clear the AC vents and leaves a big ugly gap and nice view of the fuses when removed) and an oval grommet to plug the hole in the firewall where the hard lines from the condensor went through.
Thats about it. Its simple but takes a while since you have to disassemble the grill and fuss with hoses and fittings in tight locations.