Chevy Trailblazer 4 wheel drive question?

When you use 4 high, you should drive the same as you would in 2 wheel drive. It take more room to stop if the roads are slick 4 high will only help in starting to move. If you get wilder and drive faster it just means you will only hit something harder and do more damage. Be very cautious on the bad roads and Good Luck keep safe