i need some persuasion!

[Rred]

So 4H is an open diff, meaning that the front drive shaft is free spinning except when the traction controls kicks in and the rear driveshaft is always locked in to drive. And 4H/4L locked is the center diff is locked and fully engaged with equal power continuosly going to the front and rear drive shafts. ???

Also, what is the button just below the trailer button for? It's located just to the left of the onstar button and the bottom one of the stack of three.

[HummerMann]

That button on the bottom raises or lowers the rear if you have the Adventure Package or the Air Suspension package. I have the Adventure Package on my '06 and to be honest, I've only used that button once. In a previous post someone raised the rear with that button and then drove into his garage and got the garage door with his roof racks. I can't find it in the owners manual but I believe it raises the rear 2 and half inches.
The adventure package on the 2009 H3 includes front and rear lockers on any model. You can use the front and or rear lock at your choosing because of the switches are seperate buttons.
You can't get rear locking by its self starting in 2009 on the H3. Either both or nothing.

[Rred]

Do any of the H2's come with a factory cold weather package? I found one for sale that apprears to have some sort of battery cell blanket/cover. I will deffinetly be needing one, when I get up to Alaska this fall!

[Unexpected_Comp]

As Hummermann says it raises the rear end quite a bit. I find it very useful when off-roading as your departure angle gets better.