However, most people don't buy a heavy-duty truck solely for towing and find that ... trailer weighing up to 23,000 pounds or up to a 20,000-pound trailer with a conventional receiver hitch. For ...

heavy-duty rear springs, revised shock tuning, improved cooling and a new trailer brake controller. There are also four- and seven-pin, bumper-mounted connectors, a trailer hitch (duh), and a G80 ...