Try 2 steel fence posts. You can cut them shorter if necessary but don't cut the flange off. The 2d one can be considerably shorter than the 1st.
Drive in the 1s one angled away from the truck about 10 degrees +/-. Put in the 2d about 3-4' behind it, same angle. How deep you need to put them depends on the soil. Tie something VERY sturdy from the top of the 1st to the bottom of the 2d (a heavy duty ratchet strap works great). It's useful to weld rings or something on the posts to keep the rope/chain from sliding up or down. Tie the winch cable to the bottom of the 1st one.
Now to get the posts out of the ground. I assume you have a hi-lift jack of some kind. Here's a post puller thats inexpensive and works great (but don't cut the 2d post too short to use it). I've used one for years.
POST PULLER 
