🏷️ Basic Information Identification Make: Buick Model: Regal Year: 2003 Codes Platform Code: W-body 👋 Introduction Market Position Target Audience: Buick Regal owners, DIY mechanics, professional repair shops Competitive Analysis Value Proposition: Provides factory-level diagnostic and repair information, saving time and money compared to relying solely on mechanics. Key Features Ease Of Use: Single, easy-to-use PDF manual, no flipping through multiple books. Portability: Printable pages allow for easy transport to the garage or workshop. Durability: Digital format prevents greasy pages or torn paper manuals. 📋 Manual Details Coverage Areas Covered Models: All Buick Regal models Repair Scope: A-Z, vehicle-specific Page Count Estimated Page Count: Extensive (typical for full factory service manuals, often 1500+ pages) Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Maintenance: Included Engine Diagnostics: Included Control Systems: Included Mechanical Repairs: Included Fuel System Service: Included Emission Control Systems: Included Intake Exhaust Cooling: Included Lubrication System: Included Ignition Starting Charging: Included Automatic Transmission Clutch: Included Manual Transmission: Included Transfer Propeller Shaft: Included Drive Shaft: Included Differential: Included Axle Suspension: Included Tire Wheel Assembly: Included Brake Control Systems: Included Brake Systems: Included Parking Brake System: Included Steering Column: Included Power Steering System: Included Air Conditioning System: Included Supplemental Restraint System Srs: Included Seat Belt Systems: Included Engine Immobilizer System: Included Cruise Control System: Included Wiper Washer System: Included Door Lock Systems: Included Meter Audio Visual Systems: Included Horn System: Included Windshield Glass Mirror Systems: Included Instrument Panel Systems: Included Seat Systems: Included Engine Hood Door Systems: Included Exterior Interior Trim: Included Electrical Systems General: Included Multiplex Can Communication: Included Procedures Included Maintenance Procedures: Complete step-by-step instructions Diagnostic Procedures: Included Repair Procedures: Complete step-by-step instructions for all repairs Troubleshooting Guides: Included Technical Depth Depth: Factory-level detail, suitable for professional technicians and advanced DIYers Wiring Information: Wiring schematics included Illustrations Diagrams: Detailed diagrams and illustrations included 📊 Manual Specifications File Format Compatibility: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac Reader Requirement: Adobe PDF Reader Unzip Requirement: Winzip (or equivalent) Print Quality Printability: All pages printable Image Scaling: Ability to blow up images for enlarged printing Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Options 2003: 3.8L V6 (L36 naturally aspirated, L67 supercharged) Performance L36 Horsepower: Approx. 205 hp @ 5200 rpm L36 Torque: Approx. 230 lb-ft @ 4000 rpm L67 Horsepower: Approx. 240 hp @ 5200 rpm L67 Torque: Approx. 280 lb-ft @ 3600 rpm Fuel System Fuel Delivery: Sequential Fuel Injection (SFI) 🔧 Transmission Standard Standard Transmission: 4-speed automatic (4T65-E) Optional Optional Transmission: 4-speed automatic with manual shift mode (4T65-E HD for supercharged models) Features Transmission Fluid: Dexron III (or Dexron VI as a replacement) 📐 Dimensions Exterior Wheelbase: Approx. 110.5 inches Length: Approx. 197.3 inches Width: Approx. 71.4 inches Height: Approx. 55.7 inches Weights Curb Weight: Varies by model and options, typically 3400-3700 lbs 🛡️ Safety Features Ratings NHTSA Frontal Driver Rating: 5-star (for most configurations) NHTSA Frontal Passenger Rating: 5-star (for most configurations) Active Features ABS: Standard Traction Control: Optional or standard depending on trim/engine (often called Traction Control System - TCS) Passive Features Airbags: Driver and front passenger airbags; optional side airbags 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD player, optional premium sound systems, steering wheel audio controls. Driver Assistance Key Features: Cruise control, optional anti-lock brakes (ABS). Connectivity Cellular Connectivity: No built-in cellular connectivity typical for this era. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 3,000-5,000 miles or 3-6 months, depending on driving conditions and oil type used. Transmission Fluid Change Interval: Refer to manual, typically 50,000-100,000 miles for severe service. Fluid Specifications Engine Oil Specification: API Certified SAE 5W-30 (viscosity may vary slightly based on temperature and engine variant). Coolant Specification: GM Type II (Dex-Cool) Orange Coolant Known Issues Common Buick Regal Issues: Intake manifold gasket leaks (especially on 3800 V6), torque converter shudder, power steering pump leaks, window regulator failures, ABS sensor issues. 📚 Vehicle History Brand Heritage Buick Legacy: Buick has a long history of producing comfortable and well-equipped American sedans. Model Evolution Regal Positioning: The Regal was positioned as a sporty and upscale mid-size sedan within Buick's lineup. Production Regal Generation 2003: This is part of the fifth generation (1997-2004) of the Buick Regal, based on the GM W-body platform.