The Nissan Titan is a full-size pickup truck manufactured in the United States for the North American market by Nissan. It was named for the Titans of Greek mythology.
Development of the Titan began in September 1999, with design work under Diane Allen. Giovanny Arroba's TA60 exterior was chosen in late 2000, with a final production freeze in July 2001. The design language of the future truck was previewed by the 2001 Alpha T concept shown at the 2001 Detroit Auto Show, which had previously developed through November 2000.
Production began on September 21, 2003 and sales on December 1, 2003. The Titan used Nissan's new full-size F-Alpha platform. This new platform was shared with the Nissan Armada and Infiniti QX56 SUVs, with all three manufactured in Canton, Mississippi, United States. The first generation Titan continued without a major redesign through 2015.
All models came standard with a 32-valve, 5.6-liter engine, VK56DE, which generates 317 hp (236 kW) (305 hp or 227 kW on 2004–2006 models) and 385 lb⋅ft (522 N⋅m) of torque. The first generation Titan came equipped with a fully boxed ladder frame and was available in either rear-wheel drive or a shift-on-the-fly four-wheel-drive system coupled with a five-speed RE505A automatic transmission. An automatic brake-limited slip (ABLS) system was available on all Titans. The first generation was available as a King Cab (extended cab) or a crew cab with a full-sized back seat, with no regular cab being offered. The King Cab featured a 6-foot-7-inch (2.01 m) bed, while the crew cab had a 5-foot-7-inch (1.70 m) bed. In 2008, a longer wheelbase model was offered with either an 8-foot-3-inch (2.51 m) bed on the King Cab or a 7-foot-3-inch (2.21 m) bed on the crew cab. There were originally four trim levels available: the S, SV, Pro-4x, SE, and LE. The SE and LE trim was eventually replaced by the luxury SL trim. The S was the base model, the SV a mid-level model with more features, the PRO-4X was the off-road-oriented version, and the top level SL was offered with features like 20-inch alloy wheels as standard equipment.