Not sure when the last time this parish fellow drove a 10 second truck on the street but I'd really be willing to bet if he drove that blue thing on the street in real life he would NOT cruise around in 4HI because it makes no sense. Reread the topic, locked in 4HI makes no sense on the street with turns and stuff.
To other people: The front DS spins almost all the time no matter which system you have.....kinda like a truck with cold trans fluid WILL move forward if started in Neutral. Here's another tidbit...4WD and AWD is NOT the same. There is even more than one type of AWD just on GM trucks.
Anything else?