🏷️ Basic Information Identification Make: Buick Model: Regal Year: 2004 Codes Chassis Code: W-Body Generation Generation Name: Sixth Generation (L67/GM 3800 Series III) Generation Years: 2000-2004 👋 Introduction Market Position Segment: Mid-size Sedan Target Audience: Individuals seeking reliable transportation with a touch of luxury and performance, and DIY mechanics. Competitive Analysis Key Competitors: Ford Taurus, Toyota Camry, Honda Accord, Chrysler Sebring, Dodge Intrepid. Key Features Powertrain Options: Known for its supercharged 3800 Series III V6 engine option. Platform Shared: Shares the W-body platform with other GM vehicles like Chevrolet Impala and Monte Carlo. Value Proposition: Offers a blend of comfort, performance (especially with the supercharged engine), and durability, often at a competitive price point. 📋 Manual Details Coverage Areas Primary Coverage: 2004 Buick Regal Secondary Coverage Notes: Likely covers major systems and components common across the 2000-2004 Regal W-body platform, with specific emphasis on 2004 updates. Page Count Estimated Page Count: Extensive (typical for a comprehensive OE-derived service manual, often 1000+ pages in printed equivalent) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: PDF Download (accessible via web browser) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, cylinder heads, pistons, crankshaft, camshaft, valve train, timing, lubrication, cooling. Engine Performance: Fuel injection, ignition system, emissions control, diagnosis and testing. Transmission Drivetrain: Automatic transmission (e.g., 4T65-E), torque converter, differentials, drive axles, transfer case (if applicable). Brakes: Hydraulic system, ABS, electronic brake control, brake rotors, pads, calipers, lines, parking brake. Suspension Steering: Front suspension, rear suspension, struts, shocks, control arms, ball joints, steering gear, power steering system, wheel alignment. Electrical Electronics: Battery, charging system, starting system, lighting, instrument panel, body control modules, infotainment, wiring diagrams. Heating Air Conditioning: HVAC system, climate control, refrigerant handling, compressor, evaporator, heater core. Body Chassis: Body structure, doors, windows, seats, bumpers, exterior trim, interior trim, corrosion protection. Restraints: Airbag system, seat belts, SRS module. Procedures Included Maintenance: Routine maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt replacement. Diagnostics Troubleshooting: Systematic fault finding, diagnostic trouble codes (DTCs), symptom analysis, component testing. Repair Rebuild: Component removal and installation, engine rebuild procedures, transmission overhaul, brake caliper replacement, suspension component replacement. Electrical Diagnostics: Reading wiring diagrams, testing electrical components, circuit tracing, module diagnostics. Technical Depth Depth: Comprehensive OE-level detail, suitable for professional technicians and experienced DIY enthusiasts. Detail Level: Step-by-step repair instructions, torque specifications, special tool requirements, diagnostic procedures, and specifications. 📊 Manual Specifications File Format Format: PDF Quality: High-resolution, professionally scanned or digitally generated, allowing for clear viewing and printing. Searchability: Likely includes searchable text for quick information retrieval. Print Quality Printability: Designed to be printable, allowing users to create physical copies of specific sections. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code Typical: L36 (3.8L naturally aspirated V6) or L67 (3.8L supercharged V6) Displacement Liter: 3.8 Cylinders: 6 Configuration: V-engine Aspirated Type: Naturally Aspirated or Supercharged Performance Horsepower L36: Approx. 200 hp @ 5200 rpm Torque L36: Approx. 225 lb-ft @ 4000 rpm Horsepower L67: Approx. 240 hp @ 5200 rpm Torque L67: Approx. 280 lb-ft @ 3600 rpm Fuel System Fuel Delivery: Multi-port Fuel Injection (MPFI) Fuel Type: Unleaded Gasoline 🔧 Transmission Standard Type: 4-speed Automatic Model Code: 4T65-E Optional Type: N/A (Typically only automatic was offered for this generation Regal) Features Overdrive: Yes, 4th gear is overdrive Drive Wheels: Front-Wheel Drive (FWD) 📐 Dimensions Exterior Length: Approx. 196.3 inches Width: Approx. 71.4 inches Height: Approx. 55.9 inches Wheelbase: Approx. 109.0 inches Weights Curb Weight Est: 3500-3700 lbs (depending on trim and options) 🛡️ Safety Features Ratings NHTSA Frontal Driver 2004: 5 Stars NHTSA Frontal Passenger 2004: 5 Stars IIHS Frontal Offset 2004: Good Active Features ABS: Standard (Anti-lock Braking System) Traction Control: Available/Standard on certain trims Passive Features Airbags: Frontal airbags, available side-impact airbags Seatbelts: 3-point seat belts with pretensioners 💡 Technology Features Infotainment Audio System: Available Monsoon premium audio system, CD player, AM/FM stereo. Climate Control: Automatic climate control available on higher trims. Driver Assistance Cruise Control: Standard Parking Assist: N/A for this model year. Connectivity Onstar: Available OnStar system integration. 🔧 Maintenance Service Intervals Oil Change Interval Synthetic: Every 7,500 - 10,000 miles or 6-12 months with synthetic oil. Engine Air Filter: Inspect every 15,000 miles, replace as needed (typically 30,000 miles). Cabin Air Filter: Replace every 15,000 - 30,000 miles or as needed for air quality. Spark Plugs: Inspect/replace at approx. 100,000 miles (longer life plugs) Transmission Fluid: Inspect periodically, change every 50,000 - 100,000 miles depending on driving conditions. Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic Engine Oil Capacity: Approx. 4.5 quarts (with filter) Transmission Fluid Type: Dexron VI (or equivalent) Coolant Type: Dex-Cool (Orange Extended Life) Known Issues Intake Manifold Gaskets: On L36 and L67 engines, the original plastic...