This manual covers the GMC Sierra Pickup Truck, specifically the Second Generation (GMT400) models produced from 1988 through 1998. Known for its durability, powerful V8 engine options, and significant towing and hauling capabilities, the GMC Sierra Pickup Truck served as a reliable platform for both commercial and personal use. This generation, introduced in 1988, featured aerodynamic improvements and a modernized chassis, with a notable facelift occurring for the 1995 model year that enhanced its styling and interior.

This comprehensive workshop service repair manual provides in-depth guidance for maintaining and repairing your GMC Sierra Pickup Truck. It covers all essential systems, including engine mechanics and diagnostics for various gasoline and diesel powertrains, transmission overhauls, drivetrain components, braking systems, suspension, steering, and the complete electrical system with detailed wiring diagrams. Furthermore, it details routine maintenance procedures, troubleshooting charts, body repair, HVAC systems, and provides critical torque specifications and alignment data, ensuring you have the necessary information for all service needs.