🏷️ Basic Information

Make:

Cadillac

Model:

Seville

Year:

1998

Platform Code:

G

Vin Code Engine:

G

Vin Code Assembly Plant:

7

👋 Introduction

Vehicle Segment:

Full-size luxury sedan

Cadillac Positioning:

Flagship luxury offering, competing with domestic and international luxury marques

Key Competitors 1998:

Lincoln Continental, Lexus LS400, Mercedes-Benz S-Class, BMW 7 Series

Design Philosophy:

Eldorado-inspired styling, focus on comfort and advanced technology for its era

Notable Technologies:

MagneRide adaptive suspension (though not standard on all trims), Northstar V8 engine

📋 Manual Details

Major Areas Covered:

Features, Controls, Maintenance, Service Schedules, DIY Activities, Towing, Safety

Estimated Page Count:

200-300

Manual Category:

Owner's Manual

Language:

English

Digital Format:

PDF

📖 Manual Coverage

Powertrain Systems:

Engine operation, cooling system, fuel system, exhaust system

Chassis Systems:

Braking system, steering system, suspension system

Electrical Systems:

Lighting, power accessories, basic fuse identification, dashboard warning lights

Comfort And Convenience:

Climate control, audio system, power seats, windows, locks, mirrors

Routine Maintenance:

Oil change recommendations, tire pressure checks, fluid level checks, filter replacement guidance

Diy Activities:

Basic bulb replacement, wiper blade replacement, jump starting, tire changing

Safety And Emergency:

Towing procedures, safe driving practices, emergency equipment usage, basic troubleshooting

Diagnostics Level:

Basic user-level diagnostics and warning light interpretation

Repair Scope:

Focuses on owner-accessible maintenance and minor repairs, not deep mechanical or electrical repair

📊 Manual Specifications

PDF Quality:

High-resolution, text-searchable for easy navigation and printing

Printable:

Yes, designed for printing on standard paper sizes (Letter/A4)

Binding Description:

N/A (Digital PDF format)

Paper Type Description:

N/A (Digital PDF format)

⚙️ Engine Specifications

Engine Type:

4.6L V8 (Northstar L37/LD8)

Engine Code Identifier:

VIN 'G' denotes the 4.6L Northstar V8

Engine Layout:

V-configuration, Front-Wheel Drive

Horsepower L37:

300 hp @ 6000 rpm

Torque L37:

295 lb-ft @ 4400 rpm

Horsepower Ld8:

275 hp @ 6000 rpm (standard Seville)

Torque Ld8:

290 lb-ft @ 4400 rpm (standard Seville)

Fuel Delivery:

Sequential Electronic Fuel Injection (SEFI)

Fuel Type:

Unleaded Gasoline (Premium recommended for Northstar)

Block Material:

Aluminum Alloy

Cylinder Head Material:

Aluminum Alloy

Valvetrain:

Dual Overhead Camshafts (DOHC), 4 valves per cylinder

🔧 Transmission

Transmission Type:

4-Speed Automatic Transaxle

Transmission Model:

4T80-E

Optional Transmission:

N/A (4-speed automatic was standard)

Transmission Features:

Driver-Shift Control (DSC) allowing manual gear selection (e.g., 1, 2, 3, Drive)

📐 Dimensions

Wheelbase:

110.5 inches (2807 mm)

Length:

200.9 inches (5103 mm)

Width:

73.6 inches (1869 mm)

Height:

55.7 inches (1415 mm)

Curb Weight:

Approximately 3,800 - 4,000 lbs (1724 - 1814 kg)

Gross Vehicle Weight Rating:

Approximately 5,000 lbs (2268 kg)

Trunk Volume:

Approximately 17.8 cubic feet (504 liters)

🛡️ Safety Features

NHTSA Driver Frontal Impact:

4 Stars (as per contemporary reporting, may vary based on specific testing protocols)

NHTSA Passenger Frontal Impact:

4 Stars (as per contemporary reporting)

Traction Control:

Standard Traction Control System (TCS)

ABS:

Standard Anti-lock Braking System (ABS)

Airbags:

Driver and front passenger airbags

Seatbelts:

Three-point seatbelts for all seating positions, front seatbelt pretensioners

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for Children) system not standard for 1998, refers to older child seat mounting methods

💡 Technology Features

Audio System:

Bose premium sound system (optional/standard on higher trims), AM/FM stereo with cassette and CD player.

Climate Control:

Dual-zone automatic climate control with digital display.

Cruise Control:

Standard cruise control.

Lighting Control:

Automatic headlamp control (optional/standard on higher trims), dusk-sensing headlamps.

Onstar Availability:

OnStar was not standard for 1998, but some vehicles may have been equipped with early preparation or aftermarket units.

🔧 Maintenance

Oil Change Interval:

Every 7,500 miles or 6 months, whichever comes first, under normal driving conditions.

Air Filter Replacement:

Check every 15,000 miles, replace as needed or at 30,000 miles.

Coolant Flush Interval:

First flush at 50,000 miles, then every 30,000 miles thereafter.

Spark Plug Replacement:

Platinum-tipped spark plugs, typically good for 100,000 miles.

Engine Oil Type:

API Certified SAE 4.0W-30 Synthetic (preferred for Northstar V8)

Engine Oil Capacity:

4.5 US quarts (4.3 liters) with filter change

Coolant Type:

Dex-Cool (GM 1825M) extended-life antifreeze/coolant (Orange)

Transmission Fluid Type:

Dexron III (or equivalent DEXRON-VI)

Northstar Head Gaskets:

Potential for coolant leaks/overheating due to head gasket issues (especially earlier Northstar engines, but addressed in later revisions).

Northstar Intake Manifold Gaskets:

Leaking intake manifold gaskets can cause vacuum leaks and running issues.

Power Steering Leaks:

Common leaks at the power steering pump or hoses.

E H U Module:

Electronic Hydraulic Unit (EHU) for climate control can fail, leading to non-functional HVAC.

📚 Vehicle History

Cadillac Legacy:

Long-standing American luxury automotive brand, established 1902, known for innovation and refinement.

Seville Introduction:

The Seville nameplate was introduced by Cadillac in 1975 as a smaller, more personal luxury car.

Fifth Generation Seville:

The 1998 model is part of the fifth generation (1992-1997) or the early part of the sixth generation (1998-2004) depending on the exact design and platform overlap; however, the 1998 model year marks the introduction of the updated platform and styling. The Seville and Eldorado shared the GM G-platform.

Manufacturing Location:

Hamtramck, Michigan, USA (GM Detroit/Hamtramck Assembly)

Production Years:

1998 model year falls within the 1998-2004 generation for the Seville.

🏆 Awards & Recognition

Car And Driver 10Best:

The Northstar V8 engine itself was a recipient of the prestigious 'Ward's 10 Best Engines' award in multiple years, highlighting its technological achievement.

Motor Trend Car Of The Year:

Not a winner for 1998, but a strong contender in the luxury segment.