1998 Buick Regal Service and Repair Manual

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Covers all 1998 Regal trims — 25th Anniversary Edition Sedan 4-Door, GS Sedan 4-Door, LS Sedan 4-Door ·
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1998 Buick Regal 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

  • 25th Anniversary Edition Sedan 4-Door
  • GS Sedan 4-Door
  • LS Sedan 4-Door

Engines covered

  • 3.8L 3800CC 231Cu. In. V6 GAS OHV Supercharged
  • 3.8L 3800CC 231Cu. In. V6 GAS OHV 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 #15V70100026/10/2015Component: ENGINE AND ENGINE COOLING:ENGINE

General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chev

Consequence

Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.

Remedy

The remedy applied under recalls 08V-118, 09V-116, and 15V-201 did not adequately remove the safety

NHTSA #99V35600017/12/1999Component: EXTERIOR LIGHTING:HEADLIGHTS

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THESE VEHICLES DO NOT CONFORM TO THE REQUIREMENTS OF FMVSS NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THE VERTICAL HEAD LAMP ADJUSTING

Consequence

DRIVER VISIBILITY MAY BE IMPAIRED INCREASING THE RISK OF A CRASH.

Remedy

OWNERS WILL BE PROVIDED WITH AN OWNER'S MANUAL INSERT CONTAINING INSTRUCTIONS FOR OPTICALLY AIMING T

NHTSA #09E00500017/02/2009Component: STEERING

DORMAN IS RECALLING 979 STEERING KNUCKLES, DORMAN P/NOS. 697-902 AND 697-903, SOLD UNDER DORMAN'S "OE SOLUTIONSTM" BRAND NAME, AND NAPA P/NOS. 7-8502 AND 7-8503 WHICH WERE SOLD FOR REPLACEM

Consequence

A BROKEN STEERING KNUCKLE COULD RESULT IN LOSS OF STEERING CONTROL AND A POSSIBLE CRASH WITHOUT WARN

Remedy

DORMAN WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE STEERING KNUCKLES FREE OF CHARGE AND REIMBURSE T

NHTSA #98V10200015/05/1998Component: EXTERIOR LIGHTING:HEADLIGHTS

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE OWNER MANUALS DO NOT CONTAIN THE REQUIREMENT INFORMATION PERTAINING TO THE VEHICLE HEADLAMP AIMING DEVICE. THIS DOES NOT COMPLY WITH REQUIREMENTS OF FMV

Consequence

IF THE HEADLAMP ASSEMBLIES ARE REPLACED, CUSTOMERS MAY NOT BE ABLE TO PROPERLY AIM THE HEADLIGHTS.

Remedy

OWNERS WILL BE MAILED AN OWNER MANUAL'S INSERT WHICH CONTAINS THE APPROPRIATE INFORMATION.

NHTSA #03V52700011/12/2003Component: STEERING:RACK AND PINION

CERTAIN PASSENGER VEHICLES HAVE LOWER PINION BEARINGS IN THE POWER RACK AND PINION ASSEMBLY IN WHICH THE RETAINER TABS WERE NOT CRIMPED PROPERLY. THESE RETAINERS COULD FAIL AND PERMIT THE BALL BEARI

Consequence

IF THIS OCCURS, THE PINION SHAFT CAN BE FORCED UPWARD DURING LEFT TURNS AND BACK DOWN AS THE STEERIN

Remedy

DEALERS WILL INSTALL A NEW LOWER PINION BEARING UNLESS INSPECT OF THE EXISTING BEARING INDICATES THA

NHTSA #09V11600008/04/2009Component: ENGINE AND ENGINE COOLING

GENERAL MOTORS IS RECALLING 1,497,516 MY 1997-2003 BUICK REGAL, MY 1998-2003 CHEVROLET LUMINA, MONTE CARLO AND IMPALA, MY 1998-1999 OLDSMOBILE INTRIGUE, MY 1997-2003 PONTIAC GRAND PRIX VEHICLES EQUIPP

Consequence

IF THE MANIFOLD IS HOT ENOUGH AND THE OIL RUNS BELOW THE HEAT SHIELD, IT MAY IGNITE INTO A SMALL FLA

Remedy

DEALERS WILL REPLACE THE ENGINE’S FRONT VALVE COVER AND FRONT-VALVE-COVER GASKET WITH NEW PARTS OF A

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 #10170494

This informational bulletin provides information for dealers/technicians on Procedures to Unlock Delco Radio with Theftlock.

TSB #10246631

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

TSB #10024787

L67 ENGINE OIL SMELL OR ODOR, LEAK AT LEFT OR FRONT VALVE COVER (REPLACE VALVE COVER GASKET, GROMMENTS AND SPARK PLUG WIRE RETAINERS FOR CYLINDERS 1-3-5). *NJ UPDATED 7/25/2008 *PE

TSB #10023171

ABS PUMP RUNNING WHEN NOT NEEDED. *NJ

TSB #10018133

TIE ROD SPECIFICATIONS REVISED. GM TECH LINK. *TT

TSB #10017568

INTERMITTENT CHUGGLE OR FISHBITE ON LIGHT ACCELERATION OR A HIGHWAY SPEEDS WITH NO DIAGNOSTIC TROUBLE CODES (DTCS). *TT

Showing the 8 most recent of 73 technical service bulletins on file with NHTSA.

20160120Component: ELECTRICAL SYSTEMCrash reported2 injured

TL* THE CONTACT OWNS A 1998 BUICK REGAL. WHILE DRIVING 15 MPH, ANOTHER VEHICLE CRASHED INTO THE CONTACT'S VEHICLE. THE CONTACT SUSTAINED NECK INJURIES THAT REQUIRED MEDICAL ATTENTION. THE FRONT PASSEN

20160120Component: ENGINECrash reported2 injured

TL* THE CONTACT OWNS A 1998 BUICK REGAL. WHILE DRIVING 15 MPH, ANOTHER VEHICLE CRASHED INTO THE CONTACT'S VEHICLE. THE CONTACT SUSTAINED NECK INJURIES THAT REQUIRED MEDICAL ATTENTION. THE FRONT PASSEN

20130531Component: AIR BAGSCrash reported

I T- BONED A CAR. WHEN MY FRONT END HIT IT THE AIRBAGS WERE SET OFF. THE PASSENGER SIDE AIRBAG HAD WAY TOO MUCH CHARGE IN IT OCCURRING TO THE INSURANCE ADJUSTER. WHEN IT WENT OFF IT EXPLODED SO HARD A

20080819Component: STEERINGCrash reported

MY CAR IS CURRENTLY EXHIBITING THE EXACT SAME FAILURES THAT ARE ALREADY LISTED ON NHTSA FOR MY MAKE, MODEL & YEAR. HOWEVER, THEY SAY MY VIN# IS NOT INCLUDED IN THIS RECALL.....EVEN THOUGH I AM EXPERIE

20040206Component: AIR BAGSCrash reported

WHILE TRAVELING AT 20 MPH CONSUMER'S VEHICLE WAS HIT HEAD ON BY ANOTHER VEHICLE. UPON IMPACT, NONE OF THE AIRBAGS DEPLOYED. *AK

Showing the 5 most serious of 376 complaints filed with NHTSA.

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