🏷️ Basic Information

Make:

Cadillac

Model:

Fleetwood

Year:

1991

Model Line:

Fleetwood Brougham

Generation Name:

Ninth Generation (1991-1992)

Generation Code:

GMT400 (based chassis)

👋 Introduction

Positioning:

Premium American luxury sedan

Target Audience:

Luxury vehicle buyers, discerning individuals seeking comfort and prestige

Competitors 1991:

Lincoln Town Car, Chrysler Imperial

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

Diy Benefit:

Empowers owners to perform maintenance and repairs, saving significant costs

Convenience:

Instant online access from any internet-connected device

📋 Manual Details

Primary Coverage:

Vehicle Systems Service and Repair

Diagnostic Coverage:

Extensive diagnostic procedures and troubleshooting guides

Maintenance Coverage:

Scheduled maintenance, fluid changes, component replacement

Estimated Pages:

Comprehensive (digital format, content equivalent to several thousand printed pages)

Type:

Service and Repair Manual Software

Licensing:

Officially Licensed, OE Material Derived

Language:

English

Format:

Online/Digital Software

Access Duration:

1 Year Subscription

Access Devices:

PC, Laptop, Smartphone, Tablet (via web browser)

📖 Manual Coverage

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

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

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 Type:

Proprietary Software Platform (Web-based)

Digital Quality:

High-resolution, clear text and diagrams

Binding:

Not Applicable (Digital)

Paper:

Not Applicable (Digital)

⚙️ Engine Specifications

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

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 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

Transmission Type:

4-speed Automatic

Transmission Model:

4L80-E

Electronically Controlled:

Yes

Torque Converter Lockup:

Yes

Fluid Specification:

Dexron III (or equivalent)

📐 Dimensions

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)

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

Crash Test Results:

NHTSA and IIHS ratings for this era are generally moderate. Specific data for 1991 models can vary.

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.

Airbags:

Driver-side airbag standard.

Seatbelts:

Three-point front seatbelts, lap belts in rear.

Body Structure:

Reinforced safety cage construction.

💡 Technology Features

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.

Cruise Control:

Standard electronic cruise control.

Lighting:

Automatic headlamp control (optional).

Connectivity Features:

Limited by era; primarily focused on vehicle systems, no external connectivity.

🔧 Maintenance

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)

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

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:

Worn ball joints, control arm bushings, rear axle bearing noise.

Common Issues Electrical:

Failing body control modules (BCM), window regulator issues, HVAC blower motor resistor failure.

📚 Vehicle History

Brand Legacy:

Cadillac, founded in 1902, is renowned for luxury, comfort, and technological innovation in automobiles.

Fleetwood History:

The Fleetwood name has a long history within Cadillac, often denoting their top-tier, largest, and most luxurious models. This 1991 model represents the final generation of the front-wheel-drive Fleetwood Brougham, transitioning to a new rear-wheel-drive platform derived from GM's truck chassis.

Production Years:

1991-1992 (Ninth Generation)

Manufacturing Location:

Detroit, Michigan, USA

🏆 Awards & Recognition

Historical Accolades:

While specific awards for the 1991 model are not widely documented, Cadillac models of this era were generally well-regarded for their luxury, comfort, and ride quality, often receiving 'Car of the Year' or similar segment awards from automotive publications in previous years.