Good Morning, I just picked up a 19 2500 Diesel 4x4 with the tow package and I curious that when I put it in 4wd the cluster reads "4wd locked" Does this mean it has any sort of lockers in the diffs or it is just in 4wd with two open diffs? Also what effect does the traction control system have on the system when it is in 4wd?