🏷️ Basic Information Identification Make: Cadillac Model: Fleetwood Year: 1991 Model Line: Fleetwood Brougham Generation Generation Name: Ninth Generation (1991-1992) Generation Code: GMT400 (based chassis) 👋 Introduction Market Position Positioning: Premium American luxury sedan Target Audience: Luxury vehicle buyers, discerning individuals seeking comfort and prestige Competitive Analysis Competitors 1991: Lincoln Town Car, Chrysler Imperial Key Features Platform: Body-on-frame construction, rear-wheel drive Styling: Classic Cadillac styling with prominent grille and upright presence Interior: Spacious, opulent interior with high-quality materials and comfort-oriented features Manual Value Proposition Diy Benefit: Empowers owners to perform maintenance and repairs, saving significant costs Convenience: Instant online access from any internet-connected device 📋 Manual Details Coverage Areas Primary Coverage: Vehicle Systems Service and Repair Diagnostic Coverage: Extensive diagnostic procedures and troubleshooting guides Maintenance Coverage: Scheduled maintenance, fluid changes, component replacement Page Count Estimated Pages: Comprehensive (digital format, content equivalent to several thousand printed pages) Manual Type Type: Service and Repair Manual Software Licensing: Officially Licensed, OE Material Derived Language Language: English Format Format: Online/Digital Software Access Duration: 1 Year Subscription Access Devices: PC, Laptop, Smartphone, Tablet (via web browser) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel, ignition, exhaust, emissions control Transmission: Automatic transmission (e.g., 4L80-E) service and repair Drivetrain: Driveshaft, rear axle, differential Suspension: Front and rear suspension components, alignment Steering: Power steering system, steering column, steering linkage Brakes: Hydraulic brake system, disc brakes, drum brakes, ABS (if equipped) Electrical: Wiring diagrams, lighting, power accessories, charging system, starting system HVAC: Heating, ventilation, and air conditioning system service and repair Body: Body panels, doors, windows, interior trim, bumpers Chassis: Frame, subframes, body mounts Procedures Included Diagnostics: Component testing, fault code interpretation, circuit analysis Repair: Component removal and installation, subassembly repairs, complete rebuild procedures Maintenance: Oil changes, filter replacements, spark plug service, belt replacement, fluid checks Troubleshooting: Step-by-step guides for diagnosing common and complex issues Specifications: Torque values, clearances, timing settings, fluid capacities Technical Depth Depth: Factory-level detail suitable for professional technicians and advanced DIYers Electrical Detail: Complete factory wiring diagrams with component locations and wire colors Engine Rebuild: Detailed procedures for engine disassembly, inspection, and reassembly 📊 Manual Specifications File Format File Type: Proprietary Software Platform (Web-based) Print Quality Digital Quality: High-resolution, clear text and diagrams Binding Type Binding: Not Applicable (Digital) Paper Type Paper: Not Applicable (Digital) ⚙️ Engine Specifications Primary Engine Engine Code: L05 Engine Type: V8, Overhead Valve (OHV) Displacement: 5.7 Liters (350 cubic inches) Bore X Stroke: 4.00 in x 3.46 in (101.6 mm x 87.6 mm) Compression Ratio: 9.1:1 Performance Horsepower: 140-155 hp @ 3200-3600 RPM (depending on specific calibration/equipment) Torque: 280-295 lb-ft @ 1600-2000 RPM (depending on specific calibration/equipment) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), specifically Central Sequential Fuel Injection (CSFI) or Throttle Body Injection (TBI) depending on market and specific model variant. Fuel Type: Unleaded Gasoline Octane Rating: 87 Octane Minimum (89 Recommended) 🔧 Transmission Standard Transmission Type: 4-speed Automatic Transmission Model: 4L80-E Features Electronically Controlled: Yes Torque Converter Lockup: Yes Fluid Type Fluid Specification: Dexron III (or equivalent) 📐 Dimensions Exterior Length: 225.0 inches (5715 mm) Width: 79.4 inches (2017 mm) Height: 56.8 inches (1443 mm) Wheelbase: 134.4 inches (3414 mm) Front Track: 62.3 inches (1582 mm) Rear Track: 62.5 inches (1588 mm) Weights Curb Weight: Approx. 4,600-4,800 lbs (2087-2177 kg) Gross Vehicle Weight Rating Gvw: Approx. 5,700-5,800 lbs (2585-2631 kg) 🛡️ Safety Features Ratings Crash Test Results: NHTSA and IIHS ratings for this era are generally moderate. Specific data for 1991 models can vary. Active Features Brakes: Front disc, rear drum (standard); optional Anti-lock Braking System (ABS) Suspension: Independent front suspension, solid rear axle; some models featured optional self-leveling suspension. Passive Features Airbags: Driver-side airbag standard. Seatbelts: Three-point front seatbelts, lap belts in rear. Body Structure: Reinforced safety cage construction. 💡 Technology Features Infotainment Audio System: Delco AM/FM stereo with cassette player, optional CD player and premium sound systems. Climate Control: Manual or optional dual-zone automatic climate control. Driver Assistance Cruise Control: Standard electronic cruise control. Lighting: Automatic headlamp control (optional). Connectivity Connectivity Features: Limited by era; primarily focused on vehicle systems, no external connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 3-6 months (refer to manual for specific guidance) Transmission Fluid Change: Every 30,000-50,000 miles Coolant Change: Every 30,000-50,000 miles or 2-3 years Spark Plug Replacement: Every 60,000-100,000 miles (depending on plug type) Fluid Specifications Engine Oil Type: API Service SG or SH, SAE 5W-30 (check manual for exact viscosity) Engine Oil Capacity: 5 Quarts (4.7 Liters) with filter Coolant Type: GM P/N 1052851 (Green, Ethylene Glycol based) Brake Fluid Type: DOT 3 Known Issues Common Issues Engine: Head gasket leaks, oil leaks, intake manifold gasket leaks, early electronic control module (ECM) failures. Common Issues Transmission: Shift solenoid failures, torque converter clutch (TCC) issues in the 4L80-E transmission. Common Issues Suspension:...