Another specification I noted is the location of the center of gravity figures in the Dimension A Camper Loading column. My Lance camper center of gravity is 59". Going to the chart and looking at a Longhorn Limited 4x4 Crew Cab 8' bed 6. 7L (second and third row from the bottom of the chart) it recommends the code Z8H012300 (Dimension A @ 70. 53" maximum) which I presume is 12,300-lbs GVWR.

Code Z8M014000 (14,000-lbs GVWR?) Dimension A is limited to 47. 65" maximum.
Why does the higher GVWR require the camper center of gravity further to the rear which translates to less loading of the front axle? Maybe when the full specifications are available, we'll get more answers.
Bill