well i picked up my self a 2001 suburban HD. It came with a 6 inch lift already in place. I know its not the best on fuel but it has a current 53.5 gallon tank and room for about another 50 gallons on the other side under it. so that should put me at about 1k range if needed. If the emp thing happens well then its going to be a diffrent situation all together, I like the fact that i can push or pull pretty much anything i need to. I will be out fiting with a few extras later.