🏷️ Basic Information Identification Make: Cadillac Model: Deville Year: 1998 Chassis Code: K-Body Codes Vin Code: 6 👋 Introduction Market Position Segment: Full-size Luxury Sedan Target Audience: Discerning luxury car buyers seeking comfort, space, and advanced features for its era. Competitive Analysis Competitors: Lincoln Continental, Chrysler LHS, Buick Park Avenue, Mercedes-Benz E-Class (W210), BMW 5 Series (E39) Key Features Highlight: Northstar V8 engine, StabiliTrak stability control, Magnasteer variable assist steering, spacious interior, advanced comfort features. Manual Value Proposition Benefit: Provides extensive, factory-licensed technical data for DIY repairs and maintenance, saving significant costs over professional service. 📋 Manual Details Coverage Areas Coverage Type: Comprehensive Service and Repair Page Count Estimated Pages: 1500+ Manual Type Type: Official Licensed Service and Repair Manual Software Language Language: English Format Format: Online Software (Web Browser Accessible) Access Duration: 1 Year Subscription (with renewal options) 📖 Manual Coverage Systems Covered Engine: Full diagnostics, repair, overhaul, timing, cooling, lubrication, fuel, exhaust Transmission: Automatic transmission (4T80-E) overhaul, diagnostics, fluid service Drivetrain: Front-wheel drive system, CV joints, differential service Brakes: ABS diagnostics, caliper, rotor, brake line service, parking brake Suspension: Front and rear suspension components, struts, springs, control arms, alignment Steering: Power steering system, steering column, tie rods, rack and pinion Electrical: Wiring diagrams, component testing, fuse locations, battery, alternator, starter HVAC: Air conditioning system, heater core, blower motor, climate control diagnostics Bodywork: Exterior panel repair, interior trim removal, doors, hood, trunk, glass replacement Body Control Modules: BCM diagnostics and programming (where applicable) Lighting: Headlights, taillights, interior lighting, bulb replacement Diagnostics: OBD-II diagnostics, trouble code interpretation, symptom-based troubleshooting Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks Repair: Component replacement, system troubleshooting, mechanical repairs Overhaul: Engine and transmission rebuild procedures Diagnostics: Step-by-step diagnostic flows for common and uncommon issues Troubleshooting: Problem identification and resolution guides Wiring Diagrams: Detailed electrical schematics for all systems Specifications: Torque values, clearances, fluid capacities, alignment settings Technical Depth Depth: Factory-level repair and diagnostic information Diagnostics Complexity: Advanced diagnostics including sensor data analysis 📊 Manual Specifications File Format File Type: Proprietary Software/Web-Based Print Quality Quality: N/A (Digital) Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) Software Requirements Compatibility: PC, Laptop, Smartphone, Tablet with Web Browser and Internet Connection ⚙️ Engine Specifications Primary Engine Engine Code: L37 (Northstar) Engine Type: 4.6L DOHC 32-Valve V8 Bore X Stroke: 3.56 in x 3.31 in (90.5 mm x 84.0 mm) Compression Ratio: 10.3:1 Horsepower: 275 hp @ 5600 rpm Torque: 295 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Sequential Port Fuel Injection (SFI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Performance 0-60 Mph: Approx. 7.5-8.0 seconds 🔧 Transmission Standard Transmission Type: 4-speed Automatic Transmission Model: 4T80-E Features Features: Electronically controlled, overdrive, lock-up torque converter 📐 Dimensions Exterior Length: 207.2 in (5263 mm) Width: 74.4 in (1890 mm) Height: 54.3 in (1380 mm) Wheelbase: 115.1 in (2924 mm) Weights Curb Weight: 3,879 lbs (1759 kg) Gross Vehicle Weight Rating: 4,850 lbs (2199 kg) 🛡️ Safety Features Ratings NHTSA Frontal Impact Driver: 4/5 Stars NHTSA Frontal Impact Passenger: 4/5 Stars Active Features Stability Control: StabiliTrak standard Traction Control: Traction Control System (TCS) standard ABS: Anti-lock Braking System (ABS) standard Steering Assist: Magnasteer variable assist steering Passive Features Airbags: Driver and front passenger airbags Seatbelts: Front and rear seatbelts, driver pretensioner 💡 Technology Features Infotainment Audio System: Premium Delco Electronics sound system with cassette and/or CD player, steering wheel audio controls. Climate Control: Dual-zone automatic climate control with active response. Driver Assistance Stability Control: StabiliTrak Steering: Magnasteer variable assist steering Connectivity Onstar: Optional OnStar communication system. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 - 7,500 miles or 6 months, whichever comes first (depending on driving conditions and oil used). Transmission Fluid Change: Every 50,000 - 60,000 miles or 5 years, whichever comes first. Coolant Flush: Every 50,000 miles or 5 years. Spark Plugs: Platinum tipped spark plugs: Typically rated for 100,000 miles. Fluid Specifications Engine Oil: SAE 5W-30 (synthetic blend or full synthetic recommended for Northstar) Transmission Fluid: Dexron III (or Dexron-VI compatible fluid) Coolant: GM specification 60% Dex-Cool (Orange) coolant and 40% distilled water Power Steering Fluid: Dexron III (or Dexron-VI compatible fluid) Known Issues Engine: Head gasket failures (especially early Northstar engines, though less common on later revisions), intake manifold gasket leaks, starter failure (often integrated with the engine block). Transmission: Intermittent shifting issues, torque converter shudder. Electrical: EVAP system leaks, gauge cluster failures, window regulator issues. Suspension: Leaking struts, worn bushings. 📚 Vehicle History Brand Heritage Heritage: Cadillac, a division of General Motors, has a long history of producing luxury vehicles in the United States. Model Evolution Evolution Path: The 1998 Deville is part of the fifth generation (K-Body) of the front-wheel-drive Deville, which debuted in 1994. It received a significant facelift for 1996 and continued with minor updates...