1: verify that your coolant is good to -30F
2: Add stabill to your tank--->before you top off
*** If you can't get Non ethanol gas, add Star-tron or similar ethanol treatment when you add the stabil
*** Adding it
before you top the tank off helps mix it better.
3: Top off your gas tank, preferably with non ethanol gas.
4: Run the engine long enough to make sure the treated fuel makes it all the way to the carb.
5: Change your oil and filter, and let it run for a few minutes to coat everything with fresh oil. Fresh oil protects better than old oil.
6: Run a grease gun around the truck and make sure everything is properly lubed.
7: (optional) park the truck, remove the air cleaner, start it up and dump a good dose of Fogging oil right down the carb. Fogging oil is cheap insurance. It will smoke a lot. shut it off while it's still smokin' good.
8: Disconnect the battery
I used to be a boat mechanic. This is
"basically" how you winterize a boat. I NEVER had a boat damaged during winter storage.
Bonus points:
Stick it up on jack stands, so the tires don't get flat spots (also makes it harder for mice to invade)
Clean it up and wax it.
Hang some Damp-Rid in the cab, to keep it from getting musty smelling.
add a battery tender