The Citroën GS and GSA, produced from 1971 to 1985, represent a unique chapter in automotive history, celebrated for their innovative hydropneumatic suspension system, aerodynamic styling, and comfortable ride. These models offered a distinctive blend of advanced technology and practical design, positioning them as sophisticated yet accessible family cars that competed with contemporary offerings from other European manufacturers. The GS, launched in 1970, was recognized with the European Car of the Year award in 1971 for its groundbreaking engineering. The subsequent GSA, introduced in 1979, refined the original concept with updated styling and interior ergonomics, including a distinctive single-spoke steering wheel and revised dashboard.

This comprehensive workshop service repair manual provides detailed guidance for the maintenance, repair, and diagnosis of the Citroën GS and GSA models across their production years. It covers all essential vehicle systems, including the air-cooled flat-four engine, manual and semi-automatic transmissions, the signature hydropneumatic suspension, braking system, and electrical systems. The manual offers step-by-step procedures for routine maintenance, component overhauls, and troubleshooting common issues, making it an indispensable resource for owners, mechanics, and technicians aiming to preserve the integrity and performance of these iconic vehicles.