The S as 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. The original manual for repair the Titan vehicle for all Engine. The SE and LE trim was eventually replaced by the luxury SL trim. Download Nissan Titan Service Repair and Maintenance Manual for free in pdf and english. There were originally four trim levels available: the S, SV, Pro-4x, SE, and LE. 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. 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. 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. An automatic brake-limited slip (ABLS) system was available on all Titans. 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. All models came standard with a 32-valve, 5.6-liter engine, VK56DE, which generates 317 hp (236 kW) (305 hp or 227 kW in 2004–2006 models) and 385 lb-ft (522 N⋅m) of torque.

Free 2006 nissan titan repair manual