🏷️ Basic Information Identification Make: Buick Model: Regal Model Year: 2003 Generation Platform: GM W-body platform Codes Chassis Code: L36 (3.8L naturally aspirated), L67 (3.8L supercharged) 👋 Introduction Market Position Segment: Mid-size sedan Brand Perception: Buick aimed for a balance of comfort, quietness, and a touch of luxury within the mainstream market. Competitive Analysis Key Competitors: Ford Taurus, Chevrolet Impala, Dodge Intrepid, Toyota Camry, Honda Accord. Key Features Focus: Comfort-oriented ride, spacious interior, availability of a potent supercharged V6 engine option. 📋 Manual Details Coverage Areas Systems Covered: 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 Page Count: 200-300 (typical for this era's owner's manuals) Manual Type Type: Owner's Manual Language Language: English Format Format: Digital PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine operation, fluid types, capacities, basic maintenance procedures for engine oil, coolant, and fuel. Chassis And Suspension: Limited coverage on basic checks, tire pressure, and wheel torque specifications. Electrical And Lighting: Instrument cluster operation, lighting controls, fuse locations (basic), battery maintenance. Comfort And Convenience: Climate control system operation, power locks, security features, seating adjustments, infotainment system basics (radio, CD player). Procedures Included Routine Maintenance: Checking and topping off engine oil, coolant, windshield washer fluid; tire pressure checks; air filter inspection; battery care. Troubleshooting: Basic troubleshooting for warning lights and common vehicle issues, guidance on when to seek professional service. Safety Features: Operation of airbags, seatbelts, child seat installation recommendations, and basic safety advice for driving. Technical Depth Depth: Owner-level information for routine operation, basic maintenance, and understanding vehicle features. Does not cover in-depth diagnostics or component-level repair procedures. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable if scanned optically with OCR, or fully searchable if originally digital. Print Quality Quality: Digital reproduction of original factory manual, quality dependent on original scan or creation. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Quality: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type 1: 3.8L V6 (L36) naturally aspirated Displacement 1: 3.8 Liters (231 cu in) Horsepower 1: 200 hp @ 5200 rpm Torque 1: 230 lb-ft @ 4000 rpm Optional Engine Engine Type 2: 3.8L V6 (L67) Supercharged Displacement 2: 3.8 Liters (231 cu in) Horsepower 2: 240 hp @ 5200 rpm Torque 2: 280 lb-ft @ 3600 rpm Fuel System Fuel Delivery: Sequential Fuel Injection (SFI) Recommended Fuel: 87 Octane (for L36), 91 Octane (recommended for L67 Supercharged) 🔧 Transmission Standard Transmission Type: 4-speed automatic (4T65-E) Optional Transmission Type: 4-speed automatic with manual mode (4T65-E HD for supercharged models) Features Overdrive: Yes Traction Control: Available (Traction Control System - TCS) 📐 Dimensions Exterior Length: 198.7 inches Width: 71.4 inches Height: 57.0 inches Wheelbase: 110.5 inches Interior Passenger Volume: Approximately 103.7 cu ft Cargo Trunk Volume: Approximately 15.1 cu ft Weights Curb Weight Approx Base: 3500-3700 lbs Curb Weight Approx Supercharged: 3700-3900 lbs 🛡️ Safety Features Ratings NHTSA Frontal Driver Impact: Good (as per IIHS, NHTSA ratings varied) NHTSA Frontal Passenger Impact: Good (as per IIHS, NHTSA ratings varied) Active Features ABS: Standard (Anti-lock Braking System) Traction Control: Available (TCS) Passive Features Airbags: Driver and front passenger airbags, available side-impact airbags. Seatbelts: 3-point active front seatbelts with pretensioners, rear shoulder belts. 💡 Technology Features Infotainment Audio System: AM/FM stereo with CD player, optional cassette player, optional premium audio systems (e.g., Monsoon). Climate Controls: Manual or automatic climate control systems with single or dual-zone capabilities. Driver Assistance Cruise Control: Standard Parking Sensors: Not available for this model year. Connectivity Auxiliary Input: Not typically equipped; aftermarket solutions available. Bluetooth: Not available for this model year. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 3-6 months (depending on driving conditions and oil type, consult manual for specifics). Tire Rotation: Every 7,500 miles Air Filter Replacement: Every 15,000-30,000 miles (inspect annually) Fluid Specifications Engine Oil Viscosity: SAE 5W-30 (for both L36 and L67 engines) Engine Oil Type: API Certified, SG or higher, synthetic or conventional Coolant Type: GM Dex-Cool (Orange) Transmission Fluid Type: Dexron III or Dexron VI Automatic Transmission Fluid Power Steering Fluid Type: GM Power Steering Fluid or Dexron III/VI ATF Brake Fluid Type: DOT 3 Known Issues Common Problems: Upper strut mount bearings, intake manifold gaskets (leaks), power steering pump issues, window regulator failures, spark plug wire degradation. Supercharger Specific: Supercharger clutch bearing wear, intercooler leaks (less common). Part Numbers Example Air Filter Part No Approx: AC-Delco A3134C or equivalent (verify with VIN) Refill Capacities Engine Oil Capacity: 4.5 quarts (with filter) Coolant Capacity: Approx. 10.0 quarts (with heater) Transmission Fluid Capacity: Approx. 3.0 quarts (dry fill), 9.5...