🏷️ Basic Information Identification Make: Buick Model: Regal Year: 2003 👋 Introduction Market Position Segment: Mid-size sedan (GM's W-body platform) Target Audience: Consumers seeking comfortable, well-equipped, and reliably performing sedans. Competitive Analysis Key Competitors: Ford Taurus, Toyota Camry, Honda Accord, Nissan Altima, Chevrolet Impala Key Features Interior Comfort: Spacious cabin, comfortable seating, focus on ride quality. Performance Options: Offered with efficient V6 engines, providing a balance of power and economy. Styling: Classic Buick styling with a distinctive grille and body lines. 📋 Manual Details Coverage Areas Primary Coverage: Buick Regal 2003 Model Year Secondary Coverage: Features, controls, maintenance, service schedules, DIY activities, towing, safety Page Count Estimated Page Count: Approximately 250-350 pages (typical for a 2003 owner's manual) Manual Type Type: Owner's Manual Language Language: English Format Format: PDF Download (Electronic Version) 📖 Manual Coverage Systems Covered Powertrain: Engine operation, cooling system, fuel system, exhaust system Drivetrain: Transmission operation (automatic), drivetrain components Chassis: Braking system, steering system, suspension system Electrical: Lighting, instrumentation, power accessories, battery system Body: Doors, windows, seats, climate control, infotainment system Procedures Included Basic Maintenance: Checking fluid levels, tire pressure, wiper blade replacement, light bulb replacement Diy Activities: Limited DIY tasks as specified by the manufacturer Safety Considerations: Seat belt usage, airbag system, child restraint systems, emergency procedures Towing: Towing recommendations and precautions Technical Depth Depth: Owner-level operation, basic checks, and preventative maintenance. Does not cover in-depth diagnostics or repair procedures typically found in a service manual. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Likely text-searchable, assuming a scanned document with OCR or a natively created PDF. Print Quality Printability: Printable on standard home or office printers. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: L36 (3.8L V6) Engine Type: Naturally Aspirated Overhead Valve (OHV) V6 Displacement: 3.8 Liters (231 cubic inches) Horsepower: 205 hp @ 5200 rpm Torque: 230 lb-ft @ 3000 rpm Performance Acceleration 0 60: Approximately 8.0 - 8.5 seconds Fuel Economy City: Approximately 17-19 MPG Fuel Economy Highway: Approximately 26-29 MPG Fuel System Fuel Delivery: Sequential Port Fuel Injection (SFI) Recommended Fuel: 87 Octane Unleaded Gasoline Engine Details Block Material: Cast Iron Cylinder Head Material: Aluminum Ignition System: Distributorless Ignition System (DIS) 🔧 Transmission Standard Transmission Type: 4-Speed Automatic (4T65-E) Optional Optional Transmission: None for the standard 3.8L V6 Features Shift Modes: Driver-selectable modes (e.g., Normal, Performance, Winter - often indicated by button on shifter) Fluid Specifications Transmission Fluid Type: Dexron III (or Dexron VI as a compatible replacement) Fluid Capacity Fluid Capacity Dry: Approximately 10.5 Quarts (9.9 Liters) 📐 Dimensions Exterior Length: Approximately 197.5 inches Width: Approximately 71.4 inches Height: Approximately 56.3 inches Wheelbase: Approximately 110.5 inches Interior Passenger Volume: Approximately 103 cubic feet Cargo Trunk Volume: Approximately 15.7 cubic feet Weights Curb Weight: Approximately 3300-3500 lbs (depending on trim and options) Gross Vehicle Weight Rating: Approximately 4450 lbs 🛡️ Safety Features Ratings NHTSA Frontal Crash: 5-Star (Driver and Passenger) for 2003 model year NHTSA Side Impact: 4-Star (Front Passenger) - Varies by configuration Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Optional Traction Control System (TCS) Passive Features Airbags: Driver and front passenger airbags, optional side airbags Seat Belts: Three-point active seatbelts with pretensioners Child Restraints: LATCH (Lower Anchors and Tethers for Children) system 💡 Technology Features Infotainment Audio System: Standard AM/FM stereo with cassette and CD player, optional premium sound system with amplifier and steering wheel audio controls. Climate Control: Manual or optional dual-zone automatic climate control. Driver Assistance Cruise Control: Standard cruise control system. Connectivity Auxiliary Inputs: N/A (No standard aux input; aftermarket solutions may exist). 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 6 months, whichever comes first (under normal driving conditions). Refer to manual for severe conditions. Tire Rotation: Every 7,500 miles Coolant Flush: Every 100,000 miles or 5 years for initial service, then every 50,000 miles or 5 years. Spark Plug Replacement: 100,000 miles (if equipped with original iridium plugs) Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic Blend or Full Synthetic Engine Oil Capacity: 4.5 Quarts (4.3 Liters) with filter change Coolant Type: Dex-Cool (Orange) Extended Life Antifreeze/Coolant Brake Fluid Type: DOT 3 Known Issues Common Wear Items: Wheel bearings, suspension bushings, front struts/shocks, O2 sensors. Engine Specific: Lower intake manifold gasket leaks (on certain GM 3800 V6 engines, though less common on the L36 than earlier iterations), occasional power steering pump noise. Transmission Specific: Occasional shifting issues or solenoid problems in the 4T65-E transmission if not properly maintained. 📚 Vehicle History Brand Heritage Brand Identity: Buick, a division of General Motors, historically known for comfort, quietness, and luxury. Model Evolution Platform: Based on GM's W-body platform, shared with Chevrolet Impala, Monte Carlo, and Pontiac Grand Prix. Generation Context: This generation of Regal...