Go to the Chevy/GMC 1500 build site. The 6.2L engine is available as a stand alone option for about $2k over the 4.8L. It includes the engine, 3.42 axle upgrades trans and 9.5" axles over even the 5.3L. NHT is the RPO code for the Max Trailer Trailering Pack. It includes the G80 Eaton Locker, upgraded springs/GVWR, specific 17" wheels, and a few other details. It is comparable to Ford's Max Traielr Towing package, without the elephant mirrors. I think it's a great package offering a respectable 1700-ish pounds of loaded crew cab payload along with one of the most powerful gas engines availible.
