The 2005 Buick Park Avenue represents a full-size luxury sedan from Buick, a brand long recognized for its comfort, quietness, and refined driving experience. Building on a rich heritage, this generation of the Park Avenue, produced from 1991 to 2005, features a more aerodynamic and contemporary design. It offers a spacious interior and a comfort-oriented ride, with available powertrains including a 3.8L V6 Naturally Aspirated engine producing 205 horsepower and a more potent 3.8L V6 Supercharged engine delivering 240 horsepower. This model was engineered for refinement and passenger comfort, making it a distinctive choice in its segment. This comprehensive digital service and repair manual provides factory-level detail essential for maintaining and repairing the 2005 Buick Park Avenue. It covers all major systems, including the powertrain (engine and transmission), chassis (suspension, steering, brakes), electrical systems (wiring diagrams, modules), HVAC, and body components. Within its extensive pages, you will find detailed procedures for scheduled maintenance, diagnostic troubleshooting, component repair, and special procedures such as supercharger service. This manual is designed to assist owners, mechanics, and technicians in understanding, servicing, and preserving the vehicle's performance and longevity. 🏷️ Basic Information Identification Make: Buick Model: Park Avenue Year: 2005 Codes Platform: G-body (front-wheel drive) 👋 Introduction Market Position Vehicle Segment: Full-size Luxury Sedan Competitive Analysis Key Competitors 2005: Cadillac DTS, Lincoln Town Car, Chrysler 300M (and early 300C), Toyota Avalon, Mercury Grand Marquis Key Features Key Features Vehicle: Comfort-oriented ride, spacious interior, available supercharged engine, strong focus on quietness and refinement. Key Features Manual: Licensed OE materials, detailed diagrams, step-by-step procedures, diagnostic aids, electronic accessibility across devices. 📋 Manual Details Coverage Areas Coverage Type: Comprehensive Service and Repair Page Count Estimated Page Count: Extensive (typical for factory service manuals covering all systems) Manual Type Manual Type: Digital Service and Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine (3.8L V6 Supercharged, 3.8L V6 Naturally Aspirated), Transmission (4T65-E Automatic), Drivetrain (FWD) Chassis: Suspension (Front & Rear), Steering, Brakes (ABS, Parking Brake) Electrical: Wiring Diagrams, Lighting, Power Distribution, Body Control Module (BCM), Powertrain Control Module (PCM), Infotainment System HVAC: Heating, Ventilation, and Air Conditioning Systems Body: Body Panels, Doors, Glass, Interior Trim, Exterior Trim Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements, Spark Plug Replacement, Belt Inspections Diagnostics: Troubleshooting Guides, Diagnostic Trouble Codes (DTCs), Component Testing Repair: Engine Rebuild, Transmission Service, Brake Pad/Rotor Replacement, Suspension Component Replacement, Electrical Component Repair, HVAC System Repair Special Procedures: Supercharger Service, Tire Pressure Monitoring System (TPMS) Reset, Diagnostic Scan Tool Usage Technical Depth Depth: Factory-level detail including component removal/installation, specifications, and diagnostic strategies. 📊 Manual Specifications File Format File Format: PDF Print Quality Searchable Text: Yes Printable Pages: Yes Binding Type Binding Type: N/A (Digital) Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Code And Description: 3800 Series III Supercharged L67 (3.8L V6 OHV) or 3800 Series III Naturally Aspirated LA3 (3.8L V6 OHV) Performance Horsepower Supercharged: 240 hp @ 4400 rpm Torque Supercharged: 280 lb-ft @ 3600 rpm Horsepower Naturally Aspirated: 205 hp @ 5200 rpm Torque Naturally Aspirated: 230 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Sequential Port Fuel Injection (SFI) Fuel Type: Unleaded gasoline (87 octane recommended, 91 octane for optimal performance with supercharged) Cooling System Coolant Type: Dex-Cool Extended Life Antifreeze/Coolant (GM specification 6277M) 🔧 Transmission Standard Transmission Type: 4-Speed Automatic (4T65-E) Optional Optional Transmission: None Features Transmission Features: Driver Shift Control (optional manual shifting), Traction Control System (TCS), StabiliTrak (on some models) Fluid Specifications Transmission Fluid Type: Dexron-VI Automatic Transmission Fluid (ATF) or equivalent meeting GM specification. Transmission Fluid Capacity: Approximately 7.5 quarts (7.1 liters) for a fluid change and filter replacement. 📐 Dimensions Exterior Length: 207.2 inches (5263 mm) Width: 73.1 inches (1857 mm) Height: 57.1 inches (1450 mm) Interior Passenger Volume: 107.5 cubic feet (3.04 m³) Cargo Trunk Capacity: 16.1 cubic feet (0.46 m³) Weights Curb Weight: Approximately 3,700 - 3,900 lbs (1678 - 1769 kg) depending on trim and options Gross Vehicle Weight Rating Gvwr: Approximately 4,800 - 4,900 lbs (2177 - 2223 kg) 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5 Stars NHTSA Front Impact Passenger: 5 Stars NHTSA Side Impact Front Seat: 5 Stars NHTSA Side Impact Rear Seat: 5 Stars IIHS Front Offset Crash Rating: Good Active Features Anti Lock Brakes ABS: Standard Traction Control System TCS: Standard Electronic Stability Control Esc: StabiliTrak (Optional on some trims) Passive Features Airbags: Frontal airbags, Side-impact airbags (optional on some trims) Seatbelts: 3-point seatbelts with pretensioners 💡 Technology Features Infotainment Infotainment System Features: Available premium audio systems, CD player, cassette player (early models), optional navigation system. Driver Assistance Driver Assistance Features: Traction Control System (TCS), optional StabiliTrak stability control. Connectivity Connectivity Features: OnStar communication system (optional, subscription-based). 🔧 Maintenance Service Intervals Oil Change Interval:...