This manual covers the 2014 238, 258LP, 268, and 338 series trucks, equipped with the robust J08E Series diesel engines. These trucks are designed for commercial light to medium-duty applications, offering versatility for various body upfits such as box trucks, stake beds, and service bodies. Known for their chassis flexibility and the reliability of their 7.68-liter, inline 6-cylinder J08E engines, these models are a strong choice for businesses and owner-operators prioritizing durability and efficient operation in demanding vocational environments.

This comprehensive service manual provides detailed information essential for the maintenance, diagnosis, and repair of your truck. It covers all major vehicle systems, including the engine, drivetrain, chassis, and electrical components, offering step-by-step procedures for maintenance tasks, troubleshooting common issues, and performing component overhauls. With in-depth technical specifications, wiring diagrams, and diagnostic guidance, this manual serves as an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their 2014 238, 258LP, 268, or 338 series vehicle.