1985 Buick Regal Service and Repair Manual

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Factory-Grade Data

1985 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

  • Grand National Coupe 2-Door
  • T-Type Coupe 2-Door
  • Limited Coupe 2-Door
  • Base Coupe 2-Door

Engines covered

  • 3.8L 3800CC 231Cu. In. V6 GAS OHV Turbocharged
  • 5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated
  • 3.8L 3800CC 231Cu. In. V6 GAS OHV Naturally Aspirated
  • 4.3L 260Cu. In. V6 DIESEL OHV Naturally Aspirated
  • 5.7L 350Cu. In. V8 DIESEL 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

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Vehicle Safety Data

1985 Buick Regal Recalls & Complaints

NHTSA #85V04900029/04/1985Component: STRUCTURE:BODY:BUMPERS

THE REAR BUMPER MAY FRACTURE DURING A REAR END COLLISION, PUNCTURE THE FUEL TANK, AND CAUSE A FUEL LEAK.

Remedy

REPLACE THE REAR BUMPER BRACKETS AND THE "L" SHAPED REINFORCEMENT WITH A "U" SHAPED FULL R

NHTSA #84V15400027/11/1984Component: SEAT BELTS:FRONT:RETRACTOR

THE VEHICLES WERE ASSEMBLED WITH FRONT SEAT BELT RETRACTORS WHICH MAY NOT PERFORM ADEQUATELY DURING A COLLISION.

Remedy

THE DEALER WILL REPLACE THE LEFT AND RIGHT FRONT SEAT BELT RETRACTORS FREE OF CHARGE.

NHTSA #85V04700026/04/1985Component: VISIBILITY:WINDSHIELD

A LOSS OF BONDING ADHESION BETWEEN THE PAINT AND THE WINDSHIELD OPENING AREA COULD ALLOW THE WINDSHIELD TO SEPARATE DURING A 30 MILE PER HOUR FRONTAL BARRIER TEST REQUIRED BY FMVSS 212, WINDSHIE

Remedy

REMOVE AND REINSTALL WINDSHIELD IF A LACK OF PAINT BONDING IS EVIDENT.

NHTSA #86V03000021/02/1986Component: VEHICLE SPEED CONTROL:SPRINGS

THE THROTTLE RETURN SPRING ASSEMBLY MAY FAIL PREVENTING THE THROTTLE FROM RETURNING TO THE CLOSED (IDLE) POSITION WHEN THE ACCELERATOR PEDAL IS RELEASED.

Remedy

REPLACE THROTTLE RETURN SPRING.

NHTSA #85V11400019/09/1985Component: EQUIPMENT:OTHER:LABELS

THE CERTIFICATION LABEL LOCATED ON THE LEFT FRONT DOOR DID NOT INCLUDE A REQUIRED FEDERAL CERTIFICATION STATEMENT.

Remedy

LABELS CONTAINING CORRECT INFORMATION ARE BEING MAILED AND SHOULD BE INSTALLED ON THE LEFT FRONT

NHTSA #84V12400010/10/1984Component: STEERING:LINKAGES:TIE ROD ASSEMBLY

THE TIE RODS ARE PART OF THE STEERING LINKAGE AND TRANSMIT TURNING MOVEMENTS TO THE WHEELS. THE BOLTS THAT FASTEN THE TIE RODS TO THEIR ADJUSTERS MAY NOT BE TIGHT ENOUGH. THIS COULD ALLOW THE TIE ROD

Remedy

THE TIE ROD END BOLTS WILL BE TIGHTENED WITHOUT COST TO THE OWNER.

NHTSA #87V12400010/08/1987Component: STRUCTURE

SMALL CRACKS MAY DEVELOP IN THE BODY PILLAR AROUND THE DOOR STRIKER BOLT HOLE.

Consequence

CRACKS WOULD INCREASE LEADING TO DIFFICULTY IN CLOSINGTHE DOOR AND MIGHT ALLOW DOOR TO COME OPEN DUR

Remedy

INSTALL INNER AND OUTER REINFORCEMENT PLATE ON BOTH LEFT AND RIGHT BODY PILLARS.

NHTSA #88V01400008/01/1988Component: EXTERIOR LIGHTING:HEADLIGHTS:SWITCH

UNDER EXTENDED HEADLAMP USAGE, CIRCUITRY IN THE HEADLAMP SWITCH PANEL MIGHT EXPERIENCE INCREASED RESISTANCE AND EXCESSIVE HEAT BUILDUP.

Consequence

HEADLIGHTS WOULD CYCLE ON AND OFF. SUDDEN LOSS OFHEADLIGHTS UNDER SEVERE WEATHER OR NIGHTIMER DRIVI

Remedy

REPLACE HEADLIGHT SWITCH WITH MODIFIED SWITCH.

No service bulletins No technical service bulletins on file with NHTSA for the 1985 Buick Regal.
19951121Component: VEHICLE SPEED CONTROLCrash reported

RECALL RELATED, 86V030000, THROTTLE WENT INTO OPEN POSITION AFTER PUT THE VEHICLE IN REVERSE,IMPACT 6:00 POSITION AND 12:00 POSITION. TT

19951121Component: VEHICLE SPEED CONTROLCrash reported

RECALL RELATED, 86V030000, THROTTLE WENT INTO OPEN POSITION AFTER PUT THE VEHICLE IN REVERSE,IMPACT 6:00 POSITION AND 12:00 POSITION. TT

20010503Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS

WHILE TRAVELING AND WHEN DEPRESSING BRAKE PEDAL IT WILL NOT TRAVEL TO FLOORBOARD. CONUMER HAS TO APPLY FORCE. PLEASE PROVIDE FURTHER INFORMATION.*AK

20001205Component: ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

CARBON MANOXIDE IS GETTING INTO PASSENGER'S COMPARTMENT WHEN HEAT IS IN USE. DEALER HAS BEEN CONTACTED.*AK DUE TO DESIGN DEFECT CARBON MONOXIDE ENTERS PASSENGER AND DRIVER COMPARTMENT WHEN HEAT IS

19990421Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NEED SOLUTIONS ON PROBLEMS. NO MENTION OF SAFETY DEFECT. *AK

Showing the 5 most serious of 10 complaints filed with NHTSA.

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