The 2005 Buick Century is a mid-size sedan that embodies Buick's heritage of comfortable and reliable transportation. Built on the C-Body platform, this iteration of the Century, produced during its final model year, offers a blend of practicality and value. It is equipped with a 2.2L DOHC 16-Valve Ecotec inline-4 engine, delivering 140 horsepower and 150 lb-ft of torque, paired with a 4-speed automatic transmission. The vehicle's design focuses on a smooth ride and spacious interior, making it suitable for daily commuting and family use. Safety features include dual front airbags, optional side airbags, ABS, and traction control, contributing to its respectable safety ratings from agencies like NHTSA and IIHS for its time. This comprehensive service and repair manual provides detailed information essential for maintaining and repairing the 2005 Buick Century. It covers all major vehicle systems, including engine mechanical and electrical components, automatic transmission, brakes, suspension, steering, HVAC, and body electrical systems. Within its pages, you will find step-by-step repair procedures, diagnostic troubleshooting guides, maintenance schedules, fluid specifications, and detailed wiring diagrams. The manual is designed to assist Buick Century owners, DIY mechanics, and professional technicians in ensuring the longevity and optimal performance of their vehicle, offering factory-derived information in an accessible format. 🏷️ Basic Information Identification Make: Buick Model: Century Year: 2005 Generation Generation Code: C-Body (Second Generation, Post-1997 Redesign) 👋 Introduction Market Position Target Audience: Buick Century owners, DIY mechanics, independent repair shops. Competitive Analysis Value Proposition: Provides licensed OE-level repair information at a fraction of the cost of printed manuals or dealership service, with convenient digital access. Key Features Feature Licensing: Officially licensed, derived from OE materials. Feature Convenience: Instant online access, compatible with multiple devices. Feature Accuracy: Accurate, up-to-date service and repair data. 📋 Manual Details Coverage Areas Manual Type: Service and Repair Manual Language: English Format: PDF Download (Software) Digital Access Duration: 1 Year (with renewal options) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, disassembly, assembly, diagnostics, timing, lubrication systems, cooling systems, emissions controls. Engine Electrical: Ignition system, fuel injection system, starter system, charging system, diagnostic trouble codes (DTCs), sensor and actuator testing, wiring diagrams. Transmission Automatic: Operation, diagnosis, repair, fluid specifications, shift control, torque converter. Brakes: Hydraulic system, ABS components, rotor/pad replacement, caliper service, brake fluid specifications, bleeding procedures. Suspension: Front and rear suspension components, alignment specifications, shock absorber/strut replacement, ball joint service, control arm replacement. Steering: Power steering system, steering gear/rack and pinion service, tie rod ends, steering column components, alignment. Electrical Body: Lighting systems, power windows, power locks, mirrors, seats, wipers, horns, body control module (BCM) related circuits, interior/exterior lighting diagnostics. HVAC: Air conditioning system diagnosis, refrigerant handling, compressor, evaporator, condenser service, heater core replacement, blower motor, climate control modules. Body Interior: Panel removal and installation, trim components, seat removal, dashboard components, door panel service. Diagnostics Troubleshooting: System-specific diagnostic procedures, symptom-based troubleshooting, DTC interpretation and resolution. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt replacement, battery maintenance. Repair: Detailed step-by-step repair procedures for all major vehicle systems, including component removal, installation, and adjustment. Troubleshooting: Diagnostic flowcharts and guided troubleshooting sequences for common and complex issues. Wiring Diagrams: Comprehensive electrical wiring diagrams for all vehicle circuits. Technical Depth Depth Level: Factory-derived, comprehensive repair and diagnostic information suitable for professional technicians and advanced DIY enthusiasts. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content Compatibility: PC, Laptop, Smartphone, Tablet (via web browser) Print Quality Resolution: High-resolution, clear text and diagrams Printable: Printable pages Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: LD9 Engine Type: 2.2L DOHC 16-Valve Inline-4 (Ecotec) Displacement: 2198 cc (134 cu in) Bore X Stroke: 86 mm x 94.6 mm Compression Ratio: 10.0:1 Horsepower: 140 hp @ 5800 rpm Torque: 150 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), Sequential Multi-Port Fuel Injection (MPFI) Fuel Type: Unleaded Regular 87 Octane (minimum) Engine Management ECM Type: GM Powertrain ECM (specific model varies) 🔧 Transmission Standard Transmission Type: 4-Speed Automatic Overdrive Transmission Model: 4T65-E Features Transmission Features: Electronic shift control, overdrive, torque converter clutch. 📐 Dimensions Exterior Length: 193.4 in (4913 mm) Width: 70.9 in (1801 mm) Height: 56.7 in (1440 mm) Wheelbase: 109.0 in (2769 mm) Front Track: 59.8 in (1519 mm) Rear Track: 59.8 in (1519 mm) Weights Curb Weight: Approximately 3,300 - 3,400 lbs (1497 - 1542 kg), varies by trim and options. 🛡️ Safety Features Ratings NHTSA Frontal Driver Rating: Good (for models equipped with side airbags) NHTSA Frontal Passenger Rating: Good (for models equipped with side airbags) IIHS Frontal Offset Rating: Acceptable (for models with side airbags) Active Features Active Safety: Anti-lock Braking System (ABS), Traction Control System (TCS) (optional on some trims). Passive Features Passive...