"Heavy-Duty Payload Package (Regular Cab and
SuperCab with 8' box and SuperCrew with 6½' box;
restrictions apply) increases GVWR to 8,200 lbs. for
improved payload and towing; 17" 7-lug gray styled
steel wheels; LT245/75R17E BSW all-terrain tires;
heavy-duty shock absorbers; upgraded springs and
radiator; auxiliary transmission oil cooler; rear axle
with 9.75" gear set and 3.73 limited-slip gear ratio"
The irony for the 2019 model is that HDPP reduces the tow rating since 20" wheels are required for the best rating but unavailable with HDPP. That also makes me wonder about the value of the 9.75" gear set since it reduces GCWR from 18,400lbs to 17,100lbs.
