This manual covers the 1999 Buick Century, available in Custom and Special Edition trim levels. The Century is a mid-size sedan known for its comfortable ride and reliable performance, powered by either a 3.1L V6 or an optional 3.8L V6 engine. It features a front-wheel-drive system, MacPherson strut front suspension, and an independent trailing arm rear suspension. Key specifications include power-assisted rack and pinion steering, front disc and rear drum brakes with optional ABS, and a 4-speed automatic transmission. The vehicle offers a spacious interior with a trunk capacity of approximately 16.2 cubic feet, and standard safety features include driver and front passenger airbags and front pretensioner seat belts. This comprehensive service and repair manual provides detailed information essential for maintaining and repairing your 1999 Buick Century. It covers a wide range of systems, including the 3.1L V6 (L82) and 3.8L V6 (L36) engines, drivetrain, suspension, steering, brakes, electrical systems, HVAC, and body and interior components. The manual includes step-by-step procedures for routine maintenance, such as oil changes and filter replacements, as well as complex repair tasks like engine component replacement and transmission service. It also offers diagnostic troubleshooting guidance and detailed wiring diagrams. This resource is designed to assist owners and technicians in keeping the vehicle in optimal condition. 🏷️ Basic Information Identification Make: Buick Model: Century Year: 1999 Trim Levels Covered: Custom, Special Edition 👋 Introduction Market Position Positioning: Essential DIY repair and maintenance resource for owners of the 1999 Buick Century. Competitive Analysis Advantage: Officially licensed, OE-derived data provides superior accuracy and completeness compared to generic aftermarket manuals. Key Features Convenience: Instant online access, downloadable PDF format for offline use, compatible with multiple devices. Value: Cost-effective alternative to dealership service or expensive printed manuals, enabling significant savings on repairs. 📋 Manual Details Coverage Areas Language: English Manual Type: Service and Repair Manual Format: PDF Download (Software) Access Duration: 1 Year (with renewal options) 📖 Manual Coverage Systems Covered Engine: 3.1L V6 (L82), 3.8L V6 (L36) Drivetrain: Front-wheel drive (FWD) Suspension: Front McPherson strut, Rear independent trailing arm Steering: Power-assisted rack and pinion Brakes: Front disc, Rear drum (ABS optional) Electrical: Wiring diagrams, fuses, relays, lighting, accessories HVAC: Heating, Ventilation, Air Conditioning system Body And Interior: Body panels, trim, seats, dashboard Diagnostic Troubleshooting: Fault code interpretation, symptom-based diagnostics Procedures Included Maintenance: Oil changes, filter replacements, fluid checks, tune-ups Repair: Engine component replacement, transmission service, brake pad replacement, suspension repair, electrical component troubleshooting and replacement Disassembly And Assembly: Step-by-step instructions for major component removal and installation Technical Depth Depth: Comprehensive (OE-derived data for diagnostics, repair, and maintenance) 📊 Manual Specifications File Format File Format: PDF (Digital) Searchability: Searchable text Printability: Printable Compatibility: PC, Laptop, Smartphone, Tablet via web browser Print Quality Quality: High-resolution digital scans of original factory materials Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine 1 Displacement: 3.1 Liters (189 cu in) Engine 1 Configuration: 3100 SFI V6 (L82) Engine 1 Horsepower: 160 hp @ 5200 RPM Engine 1 Torque: 185 lb-ft @ 4000 RPM Optional Engine Engine 2 Displacement: 3.8 Liters (231 cu in) Engine 2 Configuration: 3800 Series II SFI V6 (L36) Engine 2 Horsepower: 175 hp @ 4800 RPM Engine 2 Torque: 210 lb-ft @ 3200 RPM Fuel System Fuel Delivery: Sequential Fuel Injection (SFI) Fuel Type: Unleaded Gasoline (87 Octane Recommended) 🔧 Transmission Standard Transmission Type: 4-speed automatic (4T65-E) Optional Optional Transmission: N/A (No manual transmission option) Features Transmission Features: Electronically controlled with overdrive, torque converter clutch Fluid Specifications Transmission Fluid Type: Dexron III (or equivalent) 📐 Dimensions Exterior Length: 193.4 inches Width: 70.5 inches Height: 56.5 inches Wheelbase: 109.0 inches Weights Curb Weight Approx: 3200 - 3400 lbs (depending on engine and options) Cargo Trunk Capacity Approx: 16.2 cubic feet 🛡️ Safety Features Ratings NHTSA Frontal Driver: N/A (Vehicle tested prior to current rating system) NHTSA Frontal Passenger: N/A (Vehicle tested prior to current rating system) IIHS Moderate Overlap Frontal: Acceptable Active Features ABS: Optional Anti-lock Braking System (ABS) Passive Features Airbags: Driver and front passenger airbags Seatbelts: Front pretensioner seat belts 💡 Technology Features Infotainment Infotainment System: Standard AM/FM stereo with cassette player; optional CD player, premium audio system. Driver Assistance Driver Assistance Features: Cruise control Connectivity Connectivity Features: N/A (No integrated Bluetooth or USB ports) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 miles or 6 months (using recommended oil) Air Filter Replacement: Every 30,000 miles Spark Plug Replacement: Every 100,000 miles (Platinum or Iridium) Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic Blend (API Certified) Engine Oil Capacity: 4.5 quarts (4.3 L) with filter (3.1L V6); 4.5 quarts (4.3 L) with filter (3.8L V6) Coolant Type: GM Goodwrench DEX-COOL Extended Life Antifreeze/Coolant Brake Fluid Type: DOT 3 Known Issues Common Problem 1: Intake manifold gasket leaks (especially on...