Hi and Lo options

[HummerGirl]

okay folks I need a major refresher on my off roading skills....remember I was the shotgun-honey in college and the "boys" drove the trucks while us girlies just pretty much told the guys "I told you were gonna get stuck and to go around that tree..."

So the Hummer is a new beast with lots of cool buttons. My other off road vehicle..don't laugh it was used to pull my pottery trailer to arts and crafts shows...was a Montero with 4 wheel drive. The four wheel drive on it was a pain to shift in and out of. I think I only had one option like the ML I sold for the Hummer.

So I guess what I am asking about is other than nice soft dirt or sand, When do I need to use the other options? And this traction control is new as well...never had that option on the other vehicles.

Like I said it has been years since I have done the really nitty gritty stuff and just wondering about more extreme conditions as heavy snow and mud. Hopefully we might get to see some in the mountains this weekend as we are going above the Blue Ridge Mountains to a family cabin.

Thanks in advance.