1989 Buick Regal Service and Repair Manual

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Covers all 1989 Regal trims — Custom Coupe 2-Door, Limited Coupe 2-Door, Gran Sport Coupe 2-Door ·
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1989 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

  • Custom Coupe 2-Door
  • Limited Coupe 2-Door
  • Gran Sport Coupe 2-Door

Engines covered

  • 2.8L 173Cu. In. V6 GAS OHV Naturally Aspirated
  • 3.1L 189Cu. 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 #88V18800006/12/1988Component: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP

FUEL RETURN LINES COULD FRACTURE AND ALLOW FUEL TO LEAK IN THE AREA OF THE FUEL TANK.

Consequence

IN PRESENCE OF AN IGNITION SOURCE, THIS CONDITION COULDRESULT IN A FIRE.

Remedy

INSTALL NEW FUEL RETURN PIPE ASSEMBLY.

NHTSA #95V11500005/06/1995Component: WHEELS

CRACKS DEVELOP IN THE WHEEL MOUNTING SURFACE. IF THESE CRACKS BECOME SEVERE ENOUGH, THE WHEEL WILL COMPLETELY SEPARATE FROM THE VEHICLE.

Consequence

IF WHEEL SEPARATION OCCURS WHILE THE VEHICLE IS IN MOTION, LOSS OF STEERING AND BRAKE CONTROL OF THE

Remedy

DEALERS WILL INSPECT THE MANUFACTURING DATE CODES STAMPED ON EACH WHEEL OF THE VEHICLE AND IF A WHEE

TSB #6088680

CUSTOMERS MAY COMPLAIN OF GRINDING / SCRAPING / GROANING NOISE FROM REAR SUSPENSION. *TT

TSB #39072

ABS WARNING LIGHT IS ON. *TW

TSB #39080

REAR STRUT RELATED THUMPING/SQUEAKING NOISE. *TW

TSB #37955

ABS WIRE HARNESS FOR THE RIGHT FRONT WHEEL MAY RUB ON THE BRAKE LINE CAUSING THE ABS WARNING LIGHT TO COME ON. *TW

20000127Component: VEHICLE SPEED CONTROLCrash reported1 injured

2 OCCURRENCES OF SUDDEN ACCELERATION. FIRST REPORTED TO GM DEALER 2/13/92. DEALER STATED DEFECTIVE ECM AND REPLACED ECM. NO PROBLEMS TILL RECENTLY. WHEN SHIFTING FROM PARK TO REVERSE CAR ACCELERA

20000127Component: ELECTRICAL SYSTEM:IGNITION:MODULECrash reported1 injured

2 OCCURRENCES OF SUDDEN ACCELERATION. FIRST REPORTED TO GM DEALER 2/13/92. DEALER STATED DEFECTIVE ECM AND REPLACED ECM. NO PROBLEMS TILL RECENTLY. WHEN SHIFTING FROM PARK TO REVERSE CAR ACCELERA

19950101Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPERCrash reported1 injured

REAR CALIPERS FROZE TWICE, CAUSING BRAKE FLUID TO BOIL DUE TO FRICTION AND MASTER CYLINDER TO FAIL, RESULTING IN LOSS OF CONTROL/ONE ACCIDENT/INJURY. *SKD

20020717Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINECrash reported

WHILE DRIVING ENGINE LOST POWER CAUSING A CRASH. CAUSE UNKNOWN. DEALER NOTIFIED.*AK

20020618Component: UNKNOWN OR OTHERCrash reported

THE CONSUMER WAS INVOLVED IN AN ACCIDENT. NO OTHER INFORMATION WAS GIVEN.

Showing the 5 most serious of 150 complaints filed with NHTSA.

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