1998 Cadillac Seville Service and Repair Manual

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Covers all 1998 Seville trims — STS Sedan 4-Door, SLS Sedan 4-Door ·
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1998 Cadillac Seville service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • STS Sedan 4-Door
  • SLS Sedan 4-Door

Engines covered

  • 4.6L 281Cu. In. V8 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams
NHTSA #98V14400026/06/1998Component: VISIBILITY:WINDSHIELD WIPER/WASHER

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE WINDSHIELD WIPER MOTOR 'LOW' SPEED FUNCTION CAN BECOME INOPERATIVE WHEN THE MOTOR IS SWITCHED FROM 'HIGH' TO 'LOW' SPEED.

Consequence

IF THIS WERE TO OCCUR WHILE THE VEHICLE WAS IN MOTION, THE DRIVER'S VISIBILITY COULD BE AFFECTED.

Remedy

DEALERS WILL REPLACE THE WINDSHIELD WIPER MOTOR COVER WHICH CONTAINS THE MICROPROCESSOR.

TSB #10208027

This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and

TSB #10171318

This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and

TSB #10246631

Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

TSB #10027804

GENERAL MOTORS CORP: SPECIAL COVERAGE ADJUSTMENT; ANALOG ONSTAR DEACTIVATION. *PE UPDATED 2/17/09. *PE

TSB #10026686

GMC: HARSH RIDE OR LINE INSTALLATION CONCERN WITH DELCO SHOCK KIT. CONCERNS WITH CONNECTING THE LINES TO THE SHOCKS AND THE AIR COMPRESSOR. CONCERN OF HARSH RIDE AFTER INSTALLATION. *PE

TSB #10026586

BUICK\CADILLAC\CHEVROLET\GMC\HUMMER\OLDSMOBILE\PONTIAC\SAAB\SATURN SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SPECIAL COVERAGE ADJUSTMENT-ANALOG ONSTAR DEACTIVATION. FCC RULED IN 2002 WIRELESS CARRIERS WOULD NO LONGER RE

TSB #10020584

KNOCKIG NOISES OR EXCESSIVE OIL CONSUMPTION. VEHICLES WITH LD8 OR L37 4.6L V8 ENGINES. *KB

TSB #10019202

MISSING CAMSHAFT INTERMEDIATE DRIVE SHAFT PLUG - SERVICE VME. *TT

Showing the 8 most recent of 79 technical service bulletins on file with NHTSA.

20090603Component: SUSPENSION:REARCrash reported1 injured

I HAVE A 1998 CADILLAC SEVILLE SLS AND WAS GOING THROUGH LEFT CURVE ON ROAD 40-45 MPH RIGHT REAR AXLE BROKE, CAUSING CAR TO SPIN LEFT THEN RIGHT. PARALLEL TO ROAD ON THE RIGHT AND CRASHING INTO A BIG

20040614Component: AIR BAGS:FRONTALCrash reported1 injured

WHILE CONSUMER'S VEHICLE STOPPED AT A TRAFFIC LIGHT IT WAS REAR ENDED BY ANOTHER VEHICLE, CAUSING CONSUMER'S VEHICLE TO REAR END THE VEHICLE IN FRONT. UPON IMPACT, BOTH FRONTAL AIR BAGS DID NOT DEPLOY

20040614Component: SEAT BELTS:FRONTCrash reported1 injured

WHILE CONSUMER'S VEHICLE STOPPED AT A TRAFFIC LIGHT IT WAS REAR ENDED BY ANOTHER VEHICLE, CAUSING CONSUMER'S VEHICLE TO REAR END THE VEHICLE IN FRONT. UPON IMPACT, BOTH FRONTAL AIR BAGS DID NOT DEPLOY

20120330Component: STEERINGCrash reported

TL* THE CONTACT OWNS A 1998 CADILLAC SEVILLE. WHILE DRIVING APPROXIMATELY 30 MPH, THE CONTACT HEARD A LOUD WHINING NOISE COMING FROM THE STEERING WHEEL. THE STEERING WHEEL BECAME DIFFICULT TO MANEUVER

20030728Component: ENGINE AND ENGINE COOLING:ENGINEFire reported1 injured

THE CONSUMER HAD DIFFICULTY SHIFTING THE GEARS WHEN A PASSER BY INFORMED HIM TO EXIT THE VEHICLE BECAUSE IT WAS ON FIRE. THE FIRE IN THE ENGINE COMPARTMENT TOTALED THE VEHICLE. *NLM. *AK *CB *

Showing the 5 most serious of 78 complaints filed with NHTSA.

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