🏷️ Basic Information Identification Make: Citroën Model: GS Model Years Covered: 1971-1985 Codes Ws Code: WSM (Workshop Service Manual) 👋 Introduction Market Position Vehicle Segment: Compact/Family car Competitive Analysis Key Competitors: Simca 1100, Renault 6, Fiat 128, Ford Escort Key Features Design Innovation: Distinctive aerodynamic styling, innovative hydropneumatic suspension system Manual Value Proposition: Enables DIY repairs, saving significant costs on maintenance and repair bills for owners. 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive service, repair, and maintenance for the Citroën GS Page Count Estimated Page Count: Likely several hundred pages, typical for a full WSM Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine overhaul, cooling system, fuel system, exhaust system, engine management Drivetrain: Transmission (manual and automatic variants if applicable), clutch, driveshafts, differentials Suspension Steering: Hydropneumatic suspension system (front and rear), steering rack, components Brakes: Brake system components (hydraulic and mechanical), ABS (if equipped on later models), parking brake Electrical: Complete wiring diagrams, lighting system, ignition system, starting system, charging system, instrumentation, auxiliary systems Body Chassis: Body panels, doors, windows, interior trim, chassis components, welding procedures Procedures Included Maintenance: Routine servicing, fluid changes, filter replacements, lubrication schedules Diagnostics: Troubleshooting guides, fault identification, diagnostic charts Repair: Step-by-step repair procedures for all major components and systems Overhaul: Detailed procedures for engine and transmission overhauls Installation Adjustment: Procedures for installing and adjusting various parts and systems Technical Depth Depth: In-depth, professional level covering all aspects from basic maintenance to complete mechanical and electrical system overhauls 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Full printable pages for garage use Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Requirements Software Requirements: Adobe PDF Reader Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Flat-four (Horizontally Opposed) Air-cooled Displacement Initial: 1015 cc (GS) / 1222 cc (GSA) Displacement Later: 1299 cc (GSA Club/Pallas) Performance Horsepower Range: Approx. 54 hp to 65 hp depending on engine variant and year Torque Range: Approx. 70 Nm to 91 Nm depending on engine variant and year Fuel System Fuel Delivery: Carburetor (e.g., Solex, Weber) across most variants Cooling System Cooling Method: Air-cooled Engine Management Ignition Type: Contact breaker (points) ignition system, potentially electronic ignition in later years/specific markets. 🔧 Transmission Standard Transmission Type: 4-speed manual transaxle Optional Transmission Type Optional: 3-speed semi-automatic ('transaxle automatique' / C.G.R.) was available as an option on some models. Features Clutch Type: Single dry plate diaphragm clutch Gearbox Location: Integrated with the final drive and differential (transaxle) 📐 Dimensions Exterior Length: Approx. 3,950 mm (early GS) to 4,120 mm (GSA) Width: Approx. 1,610 mm Height: Approx. 1,340 mm Weights Curb Weight: Approx. 950 kg to 1050 kg depending on variant 🛡️ Safety Features Ratings Safety Standards Era: Designed to early 1970s European safety standards; later models incorporated minor improvements. Passive Features Seatbelts: Lap belts standard, optional inertia reel belts available on later models/trims Body Structure: Reinforced passenger cell, crumple zones 💡 Technology Features Infotainment Radio System: Optional AM/FM radio, often dealer-fitted. Dashboard Design: Distinctive dashboard with a single-spoke steering wheel and pod-style instrumentation (especially on GSA). Driver Assistance Active Features: Self-leveling hydropneumatic suspension provides a consistent ride height regardless of load. Connectivity Connectivity Options: N/A for the era. 🔧 Maintenance Service Intervals Oil Change Interval Engine: Typically 5,000 - 7,500 km (as per original manuals, adjust for modern oils) Air Filter Replacement: Every 10,000 - 15,000 km or as needed based on operating conditions Fluid Specifications Engine Oil Type: API SE/SF, SAE 20W-50 or 15W-40 (check manual for exact viscosity based on ambient temperature) Brake Fluid Type: DOT 3 or DOT 4 hydraulic fluid Hydropneumatic Fluid Type: Citroën LHS 2 (or equivalent mineral-based hydraulic fluid with anti-wear additives) Known Issues Hydropneumatic System: Sphere seals degradation, hydraulic fluid leaks, pump wear, ride height adjustments Engine Cooling: Air-cooled system can be susceptible to overheating in prolonged heavy use or if cooling fins are obstructed. Carburetor tuning can be sensitive. Rust Corrosion: Common on older vehicles, especially in areas prone to road salt. Check sills, wheel arches, and floor pans. Electrical System: Aging wiring harnesses, connectors, and switches can lead to intermittent faults. 📚 Vehicle History Brand Heritage Manufacturer Origin: France Model Evolution Introduction Year: 1970 Major Updates: Introduction of the GSA in 1979 with updated interior, dashboard, bumpers, and improved engines. Production Production End Year: 1986 (production ceased shortly after the 1985 model year) Production Volume: Over 1 million units produced worldwide 🏆 Awards & Recognition Recognitions European Car Of The Year: Nominated and a strong contender upon its release, though did not win European Car of the Year.