Basic Information Identification Make: Buick Model: Park Avenue Year: 2003 Codes Platform Code: G-body (GM H-body successor platform) Introduction Market Position Segment: Full-size luxury sedan Competitive Analysis Competitors: Chrysler 300M, Lincoln Continental, Cadillac DeVille. Key Features Luxury Appointments: Focus on comfortable ride, quiet cabin, and premium interior features. Performance Orientation: Offered powerful V6 and V8 engines, often with Magna-Ride adaptive suspension. Manual Details Coverage Areas Coverage Type: Complete Workshop Service Repair Manual Page Count Estimated Pages: Extensive (specific number not provided, but described as 'complete' and 'A-Z') Manual Type Type: Service and Repair Manual Language Language: English Format Format: Downloadable (PDF compatible) Manual Coverage Systems Covered Engine: All engine variants, including diagnostics, repair, and overhaul procedures. Transmission: Coverage of all transmission types (e.g., automatic), including operation, diagnostics, and repair. Brakes: Complete brake system service, including ABS, hydraulics, and components. Electrical: Comprehensive electrical system coverage, including wiring diagrams, diagnostics, and component testing. Suspension: Front and rear suspension systems, steering, and wheel alignment procedures. Body: Body structure, exterior panels, interior trim, glass, and seals. HVAC: Heating, Ventilation, and Air Conditioning (HVAC) system service and repair. Fuel System: Fuel delivery, injection, and evaporative emission control systems. Cooling System: Cooling system components, radiator, water pump, and thermostat service. Exhaust System: Exhaust manifold, catalytic converter, muffler, and emissions control components. Wheels Tires: Wheel and tire specifications, mounting, and balancing. Procedures Included Maintenance: Routine maintenance, fluid changes, filter replacements, and lubrication. Troubleshooting: Diagnostic procedures and symptom-based troubleshooting guides for all major systems. Repair: Step-by-step repair instructions for all components and systems. Overhaul: Detailed procedures for complete engine and transmission overhauls. Installation: Instructions for installing new or replacement parts and accessories. Adjustments: Procedures for adjusting various vehicle components, such as brakes and clutch (if applicable). Technical Depth Depth: Comprehensive, covering everything from basic maintenance to advanced diagnostics and complete rebuilds. Manual Specifications File Format File Type: PDF (digital download) Print Quality Quality: High-quality, printable pages. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Engine Specifications Primary Engine Engine Code 1: 3.8L V6 (L36) Displacement 1: 3.8 Liters (231 cu in) Horsepower 1: 205 hp @ 5200 rpm Torque 1: 230 lb-ft @ 3600 rpm Optional Engine Engine Code 2: 3.8L Supercharged V6 (L67) Displacement 2: 3.8 Liters (231 cu in) Horsepower 2: 240 hp @ 5200 rpm Torque 2: 280 lb-ft @ 3600 rpm Fuel System Injection Type: Multi-port Fuel Injection (MPFI) Fuel Type: Unleaded gasoline Engine Management ECU: GM Powertrain Engine Control Module (ECM) Transmission Standard Type: 4-speed automatic Transmission Model 1: 4T65-E Optional Type 2: 4-speed automatic (electronically controlled) Transmission Model 2: 4T65-E HD (Heavy Duty, typically for supercharged models) Features Transmission Fluid: Dexron-VI Automatic Transmission Fluid (ATF) or equivalent. Dimensions Exterior Length: 201.0 inches Width: 74.4 inches Height: 57.3 inches Wheelbase: 113.8 inches Interior Passenger Volume: 107.5 cu ft Cargo Trunk Volume: 16.0 cu ft Weights Curb Weight Min: 3650 lbs (approx.) Curb Weight Max: 3900 lbs (approx.) Safety Features Ratings NHTSA Frontal Driver: 5-star NHTSA Frontal Passenger: 5-star NHTSA Side Driver: 5-star NHTSA Side Rear Passenger: 4-star Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Standard Traction Control System (TCS) Passive Features Airbags Front: Dual front airbags Airbags Side: Optional side-impact airbags Technology Features Infotainment Audio System: Bose premium audio system available on higher trims. Navigation: Optional factory navigation system. Driver Assistance Parking Assist: Optional rear parking assist sensors. Connectivity Onstar: Available OnStar communication system. Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 6 months (check manual for specific oil type and interval). Tire Rotation: Every 5,000-7,500 miles Transmission Fluid Change: Every 60,000-100,000 miles (check manual for specific recommendation). Fluid Specifications Engine Oil Type: SAE 3.8L V6: 5W-30; 3.8L Supercharged V6: 5W-30 (Consult Owner's Manual for exact specifications and capacities). Coolant Type: GM Type II Extended Life Antifreeze/Coolant (Pink) Brake Fluid Type: DOT 3 Known Issues Intake Manifold Gaskets: Leaking intake manifold gaskets (common on 3800 Series II engines). Transmission Hard Shifts: Transmission hard shifts or slipping, potentially related to solenoids or torque converter issues. Supercharger Pulley Noise: Supercharger pulley bearing noise or failure on L67 models. Power Steering Pump: Premature failure of the power steering pump or leaks. Alternator Failure: Intermittent or complete alternator failure. Vehicle History Brand Heritage Buick Legacy: Buick has a long history of producing large, comfortable, and well-appointed sedans aimed at the mature luxury market. Model Evolution Park Avenue Lineage: The Park Avenue nameplate has been used for decades, evolving from large sedans to more performance-oriented luxury vehicles in later generations. Production Manufacturing Plant: Detroit/Hamtramck Assembly, Michigan, USA Awards & Recognition Recognitions Customer Satisfaction: Generally well-regarded for comfort and reliability within its class, though specific awards may vary.