This manual covers the Sigma Diamante, a full-size sedan produced from 1990 to 1996. Known for its sophisticated styling, comfortable ride, and available V6 engine options including 2.5L, 3.0L, and 3.5L displacements, the Sigma Diamante was engineered to compete in the premium sedan segment. Its distinguishing elements include available all-wheel drive, premium interior appointments, and a focus on a quiet driving experience, making it a discerning choice for daily commuting and long-distance travel.

This comprehensive Workshop Service and Repair Manual provides detailed information for the maintenance, diagnosis, and repair of the Sigma Diamante. It covers essential systems such as the engine, transmission, drivetrain, suspension, brakes, steering, electrical components, climate control, and body. The manual offers step-by-step procedures for routine maintenance, in-depth troubleshooting guides, and complete overhaul instructions, empowering owners and technicians to effectively maintain and restore the vehicle's performance and reliability.