The 2004 Buick Park Avenue represents a full-size luxury sedan celebrated for its comfortable ride, spacious interior, and refined styling. Built on the G-body platform, this model offers a choice between the 205-horsepower 3.8L Naturally Aspirated V6 and the more potent 240-horsepower 3.8L Supercharged V6, both lauded for their durability and smooth operation, with the latter having received multiple Ward's 10 Best Engines awards. Known for its quiet cabin and advanced features for its time, including available OnStar and dual-zone automatic climate control, the Park Avenue was designed to provide a sophisticated and relaxing driving experience, competing effectively in the luxury sedan market with its emphasis on comfort and quietness. This comprehensive service and repair manual provides detailed information essential for the maintenance and repair of your 2004 Buick Park Avenue. It covers all major systems, including the 3.8L V6 engines and the 4-speed automatic transmission, braking systems, steering, suspension, and the complete electrical system with detailed wiring diagrams. The manual includes step-by-step procedures for routine maintenance, diagnostics, troubleshooting, and major repairs, offering factory-level repair specifications. This resource is invaluable for owners and technicians seeking to ensure the longevity and optimal performance of their vehicle, facilitating everything from simple fluid changes to complex component overhauls. 🏷️ Basic Information Identification Make: Buick Model: Park Avenue Year: 2004 Trim Levels: Ultra, Custom Codes Platform: G-body (GM_H_Body) 👋 Introduction Market Position Market Segment: Full-size Luxury Sedan Competitive Analysis Key Competitors: Lincoln Town Car, Chrysler 300M, Cadillac DeVille Key Features Vehicle Appeal: Comfortable ride, spacious interior, quiet cabin, V8 power (in earlier models, V6 in 2004), refined styling Manual Value Proposition Convenience: Instant online access, searchable content, available on multiple devices, replaces outdated printed manuals Cost Savings: Enables DIY repairs, reduces dealership service costs Licensing Information Licensing Status: Officially Licensed, OE Material Derived Access Period Access Duration: 1 Year (with discounts for renewal) 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive Service and Repair Page Count Page Count Estimate: Likely over 2000 pages (typical for OE service manuals) Manual Type Manual Type: Official Service and Repair Manual Software Language Language: English Format Format: PDF Download (accessed via web browser) 📖 Manual Coverage Systems Covered Engine: 3.8L Supercharged V6 (L32), 3.8L Naturally Aspirated V6 (L36) Transmission: 4-Speed Automatic (4T65E) Brakes: Front and Rear Disc Brakes, ABS, Traction Control Steering: Power Rack and Pinion Suspension: Front MacPherson Struts, Rear Multi-Link Independent Suspension, Magnasteer II (speed-sensitive steering) Electrical: Complete Wiring Diagrams, Battery, Charging System, Starting System, Lighting, Instrumentation, Body Control Module (BCM), Powertrain Control Module (PCM) HVAC: Heating, Ventilation, Air Conditioning (Automatic Climate Control) Body And Frame: Body Panels, Doors, Windows, Roof, Interior Trim, Frame Components Fuel System: Fuel Tank, Fuel Pump, Fuel Injectors, Fuel Lines Exhaust System: Exhaust Manifolds, Catalytic Converter, Muffler, Pipes Cooling System: Radiator, Water Pump, Thermostat, Hoses, Coolant Infotainment And Electronics: Radio, CD Player, OnStar System, Navigation (if equipped), Power Accessories Procedures Included Maintenance: Oil Changes, Filter Replacements, Fluid Checks and Replacements, Spark Plug Replacement, Belt Inspection/Replacement Diagnostics: Troubleshooting Guides, Diagnostic Trouble Codes (DTCs), Component Testing Repair: Engine Overhaul, Transmission Service, Brake System Repair, Suspension Component Replacement, Electrical Component Repair, Bodywork Repair Assembly Disassembly: Detailed step-by-step procedures for component removal and installation Technical Depth Depth Of Information: Factory-level diagnostic procedures, repair specifications, and wiring diagrams 📊 Manual Specifications File Format File Format: PDF (Portable Document Format) Print Quality Print Quality: High-resolution for clear diagrams and text Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code 1: L36 Engine Description 1: 3.8L (3800 cc) Naturally Aspirated Series II V6 Displacement 1: 3791 cc (231 cu. in.) Bore X Stroke 1: 96.5 mm x 86.5 mm (3.80 in x 3.41 in) Compression Ratio 1: 9.4:1 Horsepower 1: 205 hp @ 5200 rpm Torque 1: 230 lb-ft @ 4000 rpm Secondary Engine Engine Code 2: L32 Engine Description 2: 3.8L (3800 cc) Supercharged Series II V6 Displacement 2: 3791 cc (231 cu. in.) Bore X Stroke 2: 96.5 mm x 86.5 mm (3.80 in x 3.41 in) Compression Ratio 2: 8.5:1 Horsepower 2: 240 hp @ 5200 rpm Torque 2: 280 lb-ft @ 3600 rpm Fuel System Fuel Delivery: Sequential Multi-Port Fuel Injection (MFI) Fuel Type: Unleaded Gasoline (Premium recommended for L32) Fuel Tank Capacity: 17.0 Gallons (64 L) 🔧 Transmission Standard Transmission Type: 4-Speed Automatic Transmission Model: 4T65E Features Transmission Control: Electronic Control Unit (ECU) controlled Torque Converter: Lock-up type Fluid Specifications Transmission Fluid Type: Dexron III H (or equivalent) Fluid Capacity Transmission Fluid Capacity: Approximately 7.5 Quarts (7.1 Liters) for refill after draining pan 📐 Dimensions Exterior Length: 207.0 inches (5258 mm) Width: 73.4 inches (1864 mm) Height: 57.1 inches (1450 mm) Wheelbase: 113.8 inches (2890 mm) Front Track: 61.8 inches (1570 mm) Rear Track: 61.6 inches (1565 mm) Weights Curb Weight...