wait, i though all h2's were just hybrid tahoes? hmmm.... that changes everthing now!
IT would never happen. A new-age desiel is the wise and logical solution. It's a rig for off roadin and non of the current hybrid powerplants will have enough grunt to get you through anything. GM is working on a revamped duramax which is the what the h2 will get, if they do a desiel H2.