This manual covers General Motors (GM) Trucks from the 1979 to 1984 model years, including C/K Series pickups (C10, K10, C20, K20, C30, K30) and G-Series Vans (G10, G20, G30). These vehicles, part of the enduring 'Square Body' generation, are renowned for their robust construction, reliability, and versatile utility, making them a staple for work and personal use across the North American market. The engineering quality of this era GM trucks is evident in their durable chassis, capable powertrains, and straightforward design, which contributed to their significant sales success and lasting appeal.

This illustration catalogue serves as an essential guide for identifying and understanding the components of your GM truck. It provides detailed exploded-view diagrams and part identification for all major vehicle systems, including chassis and suspension, braking, engine, fuel, drivetrain, electrical, body, interior, and HVAC. The manual's primary purpose is to offer clear visual references for part sourcing, assembly, disassembly, and component layout, thereby facilitating maintenance, repair, and restoration efforts for owners and technicians. Its comprehensive coverage ensures accurate part identification, crucial for maintaining the integrity and functionality of these classic vehicles.

This manual covers General Motors (GM) Trucks from the 1979 to 1984 model years, including C/K Series pickups (C10, K10, C20, K20, C30, K30) and G-Series Vans (G10, G20, G30). These vehicles, part of the enduring 'Square Body' generation, are renowned for their robust construction, reliability, and versatile utility, making them a staple for work and personal use across the North American market. The engineering quality of this era GM trucks is evident in their durable chassis, capable powertrains, and straightforward design, which contributed to their significant sales success and lasting appeal.

This illustration catalogue serves as an essential guide for identifying and understanding the components of your GM truck. It provides detailed exploded-view diagrams and part identification for all major vehicle systems, including chassis and suspension, braking, engine, fuel, drivetrain, electrical, body, interior, and HVAC. The manual's primary purpose is to offer clear visual references for part sourcing, assembly, disassembly, and component layout, thereby facilitating maintenance, repair, and restoration efforts for owners and technicians. Its comprehensive coverage ensures accurate part identification, crucial for maintaining the integrity and functionality of these classic vehicles.