🏷️ Basic Information Identification Make: Buick Model: Park Avenue Year: 2004 Codes Platform: GM H-body 👋 Introduction Market Position Segment: Full-size luxury sedan Target Audience: Drivers seeking comfortable, spacious, and well-equipped transportation. Competitive Analysis Key Competitors: Lincoln Town Car, Cadillac DeVille, Chrysler 300M. Key Features Defining Characteristics: Smooth ride, quiet cabin, comfortable seating, ample interior space, strong V6 and V8 engine options, mature styling. 📋 Manual Details Coverage Areas Content Summary: Introduction, Instrument Cluster, Entertainment Systems, Climate Controls, Lights, Driver Controls, Locks and Security, Seating and Safety Restraints, Driving, Customer Assistance, Reporting Safety Defects (U.S. only), Cleaning, Maintenance and Specifications, Engine Compartment, Engine Oil, Battery, Fuel Information, Air Filter(s), Part Numbers, Refill Capacities, Lubricant Specifications, Accessories. Page Count Estimated Pages: Approximately 200-300 pages (typical for a 2004 owner's manual) Manual Type Type: Owner's Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine operation, engine oil, fuel, battery, air filter, refill capacities, lubricant specifications. Chassis: Braking system (implied through driving), steering (implied through driving). Electrical: Instrument cluster, lighting systems, entertainment systems, battery, accessory power. Interior: Climate controls, seating, safety restraints, locks and security, driver controls. Procedures Included Maintenance: Routine maintenance guidance, fluid checks, filter replacement (air filter), battery care. Operation: Vehicle operation, instrument panel explanation, climate control usage, lighting operation, infotainment system usage, driver assistance features (if applicable). Troubleshooting: Basic troubleshooting for common issues, indicator light explanations. Technical Depth Depth: Owner-level diagnostics and maintenance, troubleshooting common issues, understanding vehicle features and controls. 📊 Manual Specifications File Format File Type: PDF Compatibility: Requires PDF reader (e.g., Adobe Acrobat Reader, Foxit Reader). Print Quality Quality: Digital PDF from Original Factory Manual, high resolution for clarity. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type Base: 3.8L V6 (Naturally Aspirated) Engine Code Base: L36 Series II (GM 3800) Horsepower Base: 205 hp @ 5200 rpm Torque Base: 230 lb-ft @ 3600 rpm Optional Engine Engine Type Optional: 3.8L V6 Supercharged Engine Code Optional: L67 Series II (GM 3800 Supercharged) Horsepower Optional: 240 hp @ 5200 rpm Torque Optional: 280 lb-ft @ 3600 rpm Performance 0 60 Mph Base: Approximately 8.5 seconds 0 60 Mph Optional: Approximately 7.5 seconds Fuel System Fuel Delivery: Multi-port Fuel Injection (MPFI) Fuel Information Recommended Fuel: 87 Octane Unleaded Gasoline 🔧 Transmission Standard Transmission Type: 4-speed automatic Transmission Identifier: 4T65-E Features Shifting: Electronically controlled with overdrive, driver-shift control mode. Fluid Specifications Transmission Fluid: Dexron-III / Dexron-VI Automatic Transmission Fluid (ATF) 📐 Dimensions Exterior Length: 207.0 inches Width: 73.7 inches Height: 56.9 inches Wheelbase: 117.0 inches Interior Front Headroom: 39.5 inches Front Legroom: 42.9 inches Rear Headroom: 37.9 inches Rear Legroom: 37.1 inches Cargo Trunk Volume: 16.4 cubic feet Weights Curb Weight Base: 3,789 lbs Curb Weight Optional: 3,879 lbs (Supercharged) Gross Vehicle Weight Rating: 5,090 lbs 🛡️ Safety Features Ratings NHTSA Front Driver Side Impact: 5 Stars NHTSA Front Passenger Side Impact: 5 Stars NHTSA Side Driver Front: 4 Stars NHTSA Side Passenger Front: 4 Stars NHTSA Side Rear Passenger: 5 Stars IIHS Frontal Offset: Good Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Optional Traction Control System Passive Features Airbags Front: Dual front airbags Airbags Side: Optional side-impact airbags Seatbelts: Front and rear seat belts with pretensioners and load limiters. 💡 Technology Features Infotainment Audio System: Optional Bose premium sound system, AM/FM stereo with CD player, cassette deck (optional). Display Type: Integrated dashboard display for climate and audio. Driver Assistance Cruise Control: Standard cruise control. Parking Assist: Optional rear parking assist sensors. Connectivity Onstar: Optional OnStar system (requires subscription). Comfort Features Climate Control: Dual-zone automatic climate control. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000-7,500 miles or 6 months, whichever comes first (with synthetic blend or full synthetic oil). Tire Rotation Interval: Every 7,500 miles Air Filter Replacement: Inspect every 15,000 miles, replace as needed or every 30,000 miles. Transmission Fluid Change: Check fluid level regularly. Replacement interval typically 50,000-100,000 miles depending on driving conditions. Fluid Specifications Engine Oil Type: SAE 5W-30 (API Certified) Coolant Type: GM Goodwrench DEX-COOL 50/50 Prediluted Long Life Antifreeze/Coolant Brake Fluid Type: DOT 3 Known Issues Common Complaints: Intake manifold gasket leaks (especially on early L36 engines), fuel pump issues, window regulator failures, occasional transmission solenoid issues, power steering pump leaks. Engine Wear Points: The GM 3800 V6 is generally robust, but intake manifold gaskets are a known weak point causing coolant leaks. Supercharger belt on L67 can wear. Part Numbers Air Filter Example: GM Part Number: 25649659 (or equivalent aftermarket) Refill Capacities Engine Oil Capacity: 4.5 US quarts (with filter) Coolant Capacity: 12.2 US quarts (with V6 engine) 📚 Vehicle History Brand Heritage Buick Legacy: Buick has a long history in the American automotive market, known for comfort, quietness, and a more...