Nissan is positioning its Titan XD as just the right size between 1/2-ton light- and 3/4-ton heavy-duty pickup trucks. This versatility in size should suit the XD well. The Cummins diesel will, too, providing Titan owners with an excellent platform for hauling and towing up to 12,300 pounds when properly equipped. For buyers who want something just a bit smaller, there's the standard Titan in half-ton size and with plenty of configuration options.