The 2004 Buick Century, built on the W-body platform, represents a comfortable and reliable mid-size sedan designed for families, commuters, and value-conscious buyers. This generation, produced from 1997 to 2005, offers a spacious interior and a smooth ride, hallmarks of the Buick brand's legacy. It is powered by a well-regarded 3.8L V6 engine known for its balance of performance and durability, paired with a 4-speed automatic transmission and front-wheel drive. Notable features include standard cruise control, available telematics, and a strong emphasis on safety with standard front airbags and available side airbags, contributing to good crash test ratings for its era. This Service and Repair Manual Software provides comprehensive English-language documentation for the 2004 Buick Century. It covers all essential aspects of vehicle maintenance and repair, including detailed procedures for engine, drivetrain, suspension, steering, brakes, and electrical systems. The manual also includes diagnostic troubleshooting guides, component replacement instructions, and torque specifications, offering OE-level technical information suitable for both professional technicians and advanced DIY enthusiasts. With its searchable format and accessibility across multiple devices, this resource is designed to empower owners and mechanics to effectively maintain and repair their vehicle, ensuring optimal performance and longevity. 🏷️ Basic Information Identification Make: Buick Model: Century Year: 2004 Chassis Code: W-body Generation: Third Generation (1997-2005) 👋 Introduction Market Position Vehicle Segment: Mid-size Sedan Target Demographic: Families, commuters, value-conscious buyers. Competitive Analysis Key Competitors: Chevrolet Impala, Ford Taurus, Dodge Intrepid, Toyota Camry, Honda Accord. Key Features Of Manual Convenience: Instant online access, searchable format, accessible on multiple devices. Accuracy And Licensing: Officially licensed, derived from OE materials by RepairSurge. Cost Effectiveness: Saves money on repair shop labor costs. 📋 Manual Details Identification Manual Type: Service and Repair Manual Software Language: English Format: PDF Download Access Duration: 1 Year (with discounts for renewal) Compatibility: PC, Laptop, Smartphone, Tablet (via web browser) 📖 Manual Coverage Systems Engine Service And Repair: Complete diagnostic, repair, and overhaul procedures for all 2004 Century engine options. Drivetrain Service And Repair: Covers front-wheel drive, transmission (automatic), axle, driveshaft, and differential service. Suspension And Steering Service And Repair: Detailed information on front and rear suspension components, steering gear, power steering system, and wheel alignment. Brake System Service And Repair: Comprehensive coverage of hydraulic and mechanical aspects, including ABS, brake fluid, pads, rotors, calipers, and lines. Electrical System Diagnosis And Repair: Extensive wiring diagrams, component locations, and diagnostic procedures for all electrical systems, including starting, charging, lighting, and accessories. Heating And Air Conditioning Service: Detailed procedures for A/C system servicing, refrigerant handling, component replacement, and diagnosis. Body And Frame Repair: Information on body panel repair, corrosion protection, door mechanisms, glass replacement, and interior trim. Procedures Preventative Maintenance Schedules: Detailed recommended service intervals for all major maintenance tasks. Diagnostic Troubleshooting Guides: Systematic troubleshooting trees and flowcharts for common and uncommon issues. Component Replacement Instructions: Step-by-step guides for replacing virtually any component on the vehicle. Torque Specifications And Tightening Sequences: Precise torque values for all critical fasteners. Technical Depth Depth Of Coverage: OE-level technical information, suitable for professional technicians and advanced DIYers. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content for quick information retrieval. Print Quality Clarity: High-resolution diagrams and text. Binding Type Physical Binding: N/A (Digital Download) Paper Type Physical Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code Main: LA1 Engine Type: 3.8L V6 OHV Displacement Cc: 3800 Bore X Stroke: 3.78 in x 3.40 in (96.0 mm x 86.4 mm) Compression Ratio: 9.4:1 Performance Horsepower Hp: 200 hp @ 5200 rpm Torque Lb-Ft: 230 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Multi-port Fuel Injection (MPFI) Fuel Type: Unleaded Regular 87 Octane Engine Management ECM: PCM (Powertrain Control Module) 🔧 Transmission Standard Transmission Type: 4-Speed Automatic Model: 4T65-E Gear Ratios: Refer to manual for detailed ratios (specific to 4T65-E). Fluid Type: Dexron III/Mercon (or equivalent specified in manual) Features Drive Type: Front-Wheel Drive (FWD) 📐 Dimensions Exterior Length: 195.2 inches Width: 70.1 inches Height: 56.4 inches Wheelbase: 109.0 inches Weights Curb Weight Lbs: 3360 - 3450 lbs (approx., depending on trim and options) Gross Vehicle Weight Rating Gvwr Lbs: Approximately 4500 lbs Cargo Trunk Volume Cu Ft: 15.7 cu ft 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5-Star (as per NHTSA data for similar W-body vehicles of the era) NHTSA Front Impact Passenger: 5-Star (as per NHTSA data for similar W-body vehicles of the era) IIHS Moderate Overlap Frontal Offset: Good (refer to IIHS archives for specific model year ratings) Active Features ABS: Standard Anti-lock Braking System Traction Control: Available Traction Control System (TCS) Passive Features Airbags Front: Driver and front passenger airbags Airbags Side: Available side-impact airbags (often optional) Seatbelts: Three-point seatbelts for all occupants, pretensioners for front seats. 💡 Technology Features Infotainment Audio System: AM/FM stereo with CD player and/or cassette player. Optional...