Can i replace a different engine on a hummer h2?

Take out the manufacture installed engine and put a v6 engine into it.Can i replace a different engine on a hummer h2?The little v6 would be hard pressed to move that slug that you drive...Your best bet would be to install a duramax 6.6 engine in it...If you had the computer chipped then you.ll get around 18 to 20 on the highway...Really the best way is to sell the h2 and just buy a real hummer an h1....I have seen h1,s on the trail,rubicon,hammers, amd moab utah...No h2,s or 3,s.In fact the U.S. Army sends Their special forces to the rubicon once a year in h1,s...They do very well...Can i replace a different engine on a hummer h2?If you did, it would probably not last very long, since these mammoths are VERY, VERY HEAVY! If you are dissatisfied with the fuel economy (I know I would be) then check out having your rear axle ratio changed. This should improve fuel mileage better than replacing the engine!!