"Off road" package means very little actually. Usually it's gets you skid plates and a snazzy decal. 4x4 also doesn't automatically mean it's a go anywhere vehicle. It's more often the person doing the driving that's the faulty part of off-road mishaps. Chains can give undo tractions and grab too much sometimes. This can snap the chains and cause all sorts of issues with brake lines, etc. Also, in some conditions, they can make it worse as they'll actually dig you deeper. They do have thier place but not in every situation. Also, they're not something you put on and drive around with. A little manual labor to move some snow if neccessary and then proceed until the chains are actually needed may workto the better.
he manufacturers know that very few will utilize the "off road" package so they're moe or less a marketing ploy for more money from the buyer. Besides, as been said, even with the "off-road" package, in stock form the Suburban is still a strett crawler or hardpack dirt at most. Sorry. :cry: