You'd be surprised what a VG33E can pull, even a 4x2. There was this one cedar tree stump in my girlfriend's yard. It wa about 2' high and about 4 to 5 inches in diameter. I had just bought a HiLift and I wanted to try it out. I tried to rip it straight out of the ground by jacking up on a chain wrapped around the stump but the jack kept sinking. Then I tried to winch it out using my truck as a tow point. However, the chain kept slipping off the lifting arm because I didn't have an offroad kit. My last resort was my truck. I was really just playing around because the stump didn't really have to come out, but I hooked the chain around my ball hitch (on a class III reciever) and wrapped the other end twice around the stump. Sure enough it came right out. When I finally realized it had come out I had actually dragged it about 5 feet, with root ball atached (I hadn't even cut the roots). It weighed so much I had to have my girlfried help me with the light end to get it in the bed of my truck (Frontier, not X).

Here's some tips I figure you'll need:

1. If you're using a tow strap or cable drape something on the line incase it breaks and snap back. You should ideally do this with any type of line, but especially with a rope, cable, or a strap.
2. Take it easy. Go reeaaal slow until slack is taken up. At that point, just ease onto the gas. If you find that you're having to get the revs up above about 1500 rpm then you're probably not going to pull it out without damage to your truck or other property. At that much force the stump can rip out of the ground and inertia will cause it to fly into the back of your truck or in some other unknown direction.
3. Don't yank it. You should be able to "will" it out. If you feel the need to back up and get a running start, don't! The same thing can happen as in #2.
4. If you do have to back up (eg the line you're driving becomes too crowded due to trees, houses, etc) remember to check that your chain (if that's what you're using) is still hooked up. Nothing more frustrating than thinking you ripped up the stump and then find out you haven't been pulling anything at all.
5. Shift to first gear (in an auto, of course; in a manual you should know to do that alread) and 4x4 low (if you have it).