🏷️ Basic Information Identification Make: Cadillac Model: Seville Trim: STS Year: 2004 Codes Chassis Code: GMT866 👋 Introduction Market Position Segment: Full-size Luxury Sedan Target Audience: Owners seeking to perform DIY maintenance and repairs, independent repair shops, and automotive enthusiasts. Competitive Analysis Competitors: Competed with luxury sedans like the Lincoln Town Car, Lexus LS, Mercedes-Benz S-Class, and BMW 7 Series. Key Features Vehicle Highlights: Known for its comfortable ride, powerful V8 engine, sophisticated styling, and advanced features for its era, including optional Magnetic Ride Control. Manual Value Proposition: Provides dealership-level technical information, saving users significant costs on repairs and maintenance compared to professional services. Empowers users with in-depth knowledge. 📋 Manual Details Coverage Areas General Coverage: Complete service, maintenance, diagnostics, and repair for all 2004 Cadillac Seville STS models. Specific Systems: Engine, Control System, Mechanical, Fuel Service, Emission Control, Intake/Exhaust/Cooling, Lube, Ignition/Starting/Charging, Automatic Transmission, Manual Transmission, Transfer Case, Drive Shaft, Differential, Axle/Suspension, Tire/Wheel, Brake Control, Brakes, Parking Brake, Steering Column, Power Steering, Air Conditioning, Supplemental Restraint System (SRS), Seat Belt, Engine Immobilizer, Cruise Control, Wiper/Washer, Door Lock, Meter/Audio/Visual, Horn, Windshield/Glass/Mirror, Instrument Panel, Seats, Engine Hood/Doors, Exterior/Interior, Electrical Systems, Multiplex/CAN Communication. Page Count Estimated Page Count: Extensive, likely exceeding 1500 pages based on typical dealership service manual scope. Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (PDF) Compatibility Operating Systems: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible. Requirements Software Requirements: Adobe PDF Reader and Winzip (or equivalent decompression software). 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel delivery, ignition, lubrication, cooling, emissions control, exhaust systems, automatic transmission (likely 4-speed 4T80-E or similar), and rear differential. Chassis: Suspension (front and rear, likely Magnetic Ride Control for STS), steering (rack and pinion, power assist), brakes (front and rear disc, ABS, traction control), wheels, and tires. Electrical And Electronics: Complete electrical system diagnostics, wiring schematics, lighting, power windows/locks/seats, instrument cluster, audio/visual systems, climate control, security systems (immobilizer), cruise control, and body control modules (BCM). Procedures Included Maintenance: Scheduled maintenance, fluid changes (oil, coolant, transmission fluid, brake fluid), filter replacements, inspections, and tune-ups. Diagnostics And Troubleshooting: System-specific diagnostic procedures, fault code interpretation (OBD-II), symptom-based troubleshooting guides, and component testing methods. Repair And Rebuild: Detailed step-by-step repair procedures for all major and minor components, including engine overhaul, transmission repair, suspension component replacement, brake system servicing, and body panel repair. Wiring Schematics: Comprehensive electrical wiring schematics for all vehicle systems are included. Diagnostics: Detailed diagnostic procedures, including symptom-to-cause charts and guided troubleshooting trees for various electrical and mechanical issues. Technical Depth Depth: Expert-level technical depth, including torque specifications, special tool requirements, assembly/disassembly sequences, diagnostic flowcharts, and wiring diagrams. Covers everything a dealership technician would use. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text within the PDF for quick information retrieval. Print Quality Printability: All pages are printable, allowing users to print specific sections or the entire manual. Image Resolution: High-resolution diagrams and illustrations are downloadable and can be enlarged for clarity. Binding Type Binding: Digital (no physical binding, user prints as needed) Paper Type Paper Type Recommendation: Standard copier paper recommended for printing. ⚙️ Engine Specifications Primary Engine Engine Type: Northstar V8 Displacement: 4.6 Liters (280.7 cubic inches) Configuration: 4.6L V8 Performance Horsepower: Approximately 275-300 hp (depending on exact tuning, STS typically higher) Torque: Approximately 295-300 lb-ft (depending on exact tuning, STS typically higher) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), Sequential Port Injection Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) 🔧 Transmission Standard Transmission Type: Automatic Transmission Model: GM 4T80-E (4-speed automatic transaxle) Optional Optional Transmission: N/A for this model year and trim. Features Drive Type: Front-Wheel Drive (FWD) Transmission Fluid Type: Dexron III or Dexron VI automatic transmission fluid. 📐 Dimensions Exterior Length: Approximately 204.4 inches Width: Approximately 71.5 inches Height: Approximately 56.6 inches Weights Curb Weight: Approximately 3,800 - 4,000 lbs 🛡️ Safety Features Ratings NHTSA Front Impact: Likely 5-star rating (based on similar GM vehicles of the era). NHTSA Side Impact: Likely 4 or 5-star rating (based on similar GM vehicles of the era). Active Features Active Safety Features: Anti-lock Braking System (ABS), Traction Control System (TCS), StabiliTrak Stability Control. Passive Features Passive Safety Features: Front airbags, front side-impact airbags, rear side-impact airbags, active head restraints, seat belt pretensioners. 💡 Technology Features Infotainment Infotainment System: Cadillac's Audio System, typically with AM/FM stereo, CD player, and available Bose premium audio. Navigation system was an option. Driver Assistance Driver Assistance Features: StabiliTrak stability control, Traction Control System (TCS), available Ultrasonic Rear Parking Assist. Connectivity Connectivity Features: OnStar telematics system integration (subscription-based service). Comfort Features Advanced Comfort Tech: Optional Magnetic Ride Control adaptive suspension system, dual-zone automatic climate control, heated and ventilated front seats, memory seat function. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every...