🏷️ Basic Information Identification Make: Cadillac Model: STS Years Covered: 1998, 1999, 2000, 2001, 2002, 2003, 2004 Generation Model Generation: Second Generation (1998-2004) Codes Platform Code: GM G-Body (though heavily revised and specific to STS) 👋 Introduction Market Position Segment: Full-size Luxury Sedan Competitive Analysis Key Competitors: BMW 7 Series, Mercedes-Benz S-Class, Lexus LS, Audi A8, Lincoln Town Car Key Features Luxury Appointments: High-quality interior materials, advanced comfort features, sophisticated styling, powerful V8 engines. Technological Advancement: Pioneering use of magnetorheological dampers (MR suspension) and Northstar V8 engines. 📋 Manual Details Coverage Areas Primary Coverage: All models, engines, trims, and transmissions for the specified years Page Count Estimated Page Count: Extensive (typically 2000+ pages for a complete workshop manual) Manual Type Type: Complete Workshop Service Repair Manual Language Language: English Format Delivery Format: Downloadable Digital File 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical (including disassembly, assembly, diagnosis), fuel system, ignition system, exhaust system, cooling system, lubrication system, engine control systems (ECM/PCM), transmission (automatic) systems (disassembly, assembly, diagnosis, fluid changes, internal components), drivetrain (axles, driveshafts, differentials). Chassis: Suspension systems (front and rear, adaptive damping systems), steering systems (power steering, steering rack), brake systems (ABS, EBD, traction control, hydraulic components, parking brake), wheel and tire specifications. Electrical: Complete electrical system (wiring diagrams, component locations), starting and charging systems, lighting systems (headlamps, taillamps, interior), instrument cluster, power accessories (windows, locks, mirrors, seats), climate control system (HVAC), audio system, anti-theft systems, diagnostic trouble codes (DTCs) and their meanings. Body And Frame: Body panel removal and installation, interior trim, glass replacement, door mechanisms, hood and trunk operation, structural components, collision repair information, underbody coatings. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements (oil, air, fuel, cabin), spark plug replacement, fluid level checks and top-offs (coolant, brake fluid, power steering fluid, transmission fluid), tire rotation, brake inspection. Diagnostics: Troubleshooting guides for common and uncommon issues, symptom-based diagnostics, diagnostic trouble code (DTC) interpretation and resolution, electrical system diagnostics, component testing procedures. Repair: Engine rebuild procedures, transmission overhaul, suspension component replacement (struts, shocks, control arms, bushings), brake component replacement (pads, rotors, calipers), steering system repair, exhaust system repair, electrical component replacement (sensors, actuators, modules), interior and exterior trim repair. Installation: Component installation and replacement, accessory installation, body panel alignment, factory upgrade installation where applicable. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to full engine and transmission overhauls, including electrical schematics and detailed diagnostic procedures. 📊 Manual Specifications File Format Format: PDF Print Quality Printability: High-quality, printable pages for individual chapters or the entire manual Binding Type Binding Type: Not applicable (downloadable digital format) Paper Type Paper Type: Not applicable (downloadable digital format) Software Requirements Required Software: Adobe Reader (free, widely compatible) ⚙️ Engine Specifications Primary Engine Engine Code Name: GM Northstar L37/LD8 Configuration: 4.6L DOHC 32-valve V8 Performance Horsepower L37: 300 hp @ 6000 rpm Torque L37: 295 lb-ft @ 4400 rpm Horsepower Ld8: 275 hp @ 5600 rpm Torque Ld8: 292 lb-ft @ 4000 rpm Fuel System Induction Type: Sequential Multi-Port Fuel Injection (MPI) Fuel Type: Unleaded Premium Gasoline (91 octane recommended) Engine Management ECU Type: Powertrain Control Module (PCM) 🔧 Transmission Standard Type: 4-Speed Automatic (4T80-E) Optional Type: N/A for these model years Features Drive Type: Front-Wheel Drive (FWD) Transmission Control: Electronic Control Unit (ECU) controlled with driver-selectable modes (e.g., Comfort, Sport). 📐 Dimensions Exterior Length: Approximately 201.4 inches Width: Approximately 73.6 inches Height: Approximately 55.7 inches Wheelbase: Approximately 117.5 inches Weights Curb Weight: Approximately 3,800 - 4,000 lbs 🛡️ Safety Features Ratings NHTSA Front Impact Driver: Good NHTSA Front Impact Passenger: Good IIHS Front Offset: Good (for models tested) Active Features ABS: Standard Anti-lock Braking System Traction Control: Standard Traction Control System (TCS) Stability Control: Available StabiliTrak (integrated with traction control) Passive Features Airbags: Standard front airbags, optional side-impact airbags. Seatbelts: Three-point active seatbelts with pretensioners. 💡 Technology Features Infotainment Audio System: Bose premium sound system with CD player, optional cassette player, radio data system (RDS). Navigation: Optional factory navigation system with integrated display. Driver Assistance Parking Assist: Optional rear parking assist sensors. Adaptive Cruise Control: Optional Adaptive Cruise Control. Connectivity Onstar: Optional OnStar communication system. Comfort Features Climate Control: Dual-zone automatic climate control with pollen filter. Seats: Heated and ventilated front seats, power-adjustable front seats with memory function, heated rear seats (optional). 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 6 months, whichever comes first (using synthetic oil). Transmission Fluid Change: Every 50,000 - 60,000 miles (refer to manual for specific fluid type and procedure). Coolant Change: First at 100,000 miles, then every 50,000 miles thereafter (Dex-Cool coolant). Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic (API Certified) Transmission Fluid Type: Dexron III (H) ATF or equivalent Coolant Type: GM P/N 12378398 (Dex-Cool) Orange Long-Life Coolant Brake Fluid Type: DOT 3 Known Issues Engine Issues: Head gasket leaks...