Long Answer:
Don't use the rear bumper.
My 91 K5 while in transition from an on the road vehicle to a bush buggy, got stuck one day.
Notice the nice straight bumper?
I tried to get it out myself, didn't work. I used my hi-jack and bent the crap out of the bumper. Eventually had to call in the CDN Military to pull me out. (I was on base. Turns out that I was also in a no-go zone.)
Now look at my bumper.
Short Answer:
Don't use your bumper.
I would try to use the front tow hooks. In thoery if they are strong enough and bolted to the frame for towing, then they should be ok for lifting as well.
Also, from personal experience, get your self the 6' lift, not the cheaper 4'. When stuck in mud, without a good base for the jack, the four feet go down all the way and doesn't provide enough room to provide lift. Essentially, you run out of jack. When my 4' got pinched, I wasn't crying. It provided an oppurtunity to go buy a 6'.
---------- Post added at 07:18 PM ---------- Previous post was at 07:15 PM ----------
i never understood a hi lift..is it just a taller jack for bigger trucks?
Wow, I suddenly feel old. I can remember these being standard tire jacks in pickups. Now the young guys donèt know what they are. Oh well, my wife has never heard of Hitchhikers Guide To The Galaxy either.
Here's a random google image showing what a hi-jack is. They come in different lengths and fit nicely in a Jeep rack on top, or on any other roof basket. They are standard equipment for off-roaders (or a winch
).