1987 Oldsmobile 98 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
- Regency Brougham Sedan 4-Door
- Regency Sedan 4-Door
- Regency Brougham Sedan 2-Door
- Regency Touring Sedan 4-Door
- Regency Grande Sedan 2-Door
Engines covered
- 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
EXCESSIVE ACCELERATOR CABLE FRICTION MAY RESTRICT THE CABLES FREE MOVEMENT BETWEEN THE ACCELERATOR PEDAL AND THE THROTTLE BODY.
THIS COULD PREVENT THROTTLE FROM RETURNING TO CLOSED(IDLE) POSITION WHEN ACCELERATOR PEDAL IS RELEAS
REPLACE ACCELERATOR CABLE.
AN IN LINE FUSIBLE LINK MAY MELT DOWN AND CAUSE A FIRE.
THE IN LINE FUSIBLE LINK LOCATED IN THE AREA OF THEPLASTIC WINDSHIELD WASHER BOTTLE BRACKET MAY, UND
THE WINDSHIELD WASHER BOTTLE BRACKET WILL BE REPLACED.
WHILE COMING OUT OF A PARKING STOP THROTTLE GOT STUCK, RESULTING IN SUDDEN ACCELERATION, WHICH CAUSED VEHICLE TO GO DOWN AN EMBANKMENT. CAUSE UNKNOWN. PLEASE PROVIDE FURTHER INFORMATION. *AK
NAR 03-25-2003. *MR. SEVERAL PARTS ON THE VEHICLE FAILED SUCH AS 2 EGR VALVES, IDLE PASSAGE SWITCH, POWER ANTENNA, TRANSMISSION GASKET, CV BOOT, AUTOMATIC AIR CONDITION CONTROL UNIT, RADIO SPEAKERS,
NAR 03-25-2003. *MR. SEVERAL PARTS ON THE VEHICLE FAILED SUCH AS 2 EGR VALVES, IDLE PASSAGE SWITCH, POWER ANTENNA, TRANSMISSION GASKET, CV BOOT, AUTOMATIC AIR CONDITION CONTROL UNIT, RADIO SPEAKERS,
NAR 03-25-2003. *MR. SEVERAL PARTS ON THE VEHICLE FAILED SUCH AS 2 EGR VALVES, IDLE PASSAGE SWITCH, POWER ANTENNA, TRANSMISSION GASKET, CV BOOT, AUTOMATIC AIR CONDITION CONTROL UNIT, RADIO SPEAKERS,
NAR 03-25-2003. *MR. SEVERAL PARTS ON THE VEHICLE FAILED SUCH AS 2 EGR VALVES, IDLE PASSAGE SWITCH, POWER ANTENNA, TRANSMISSION GASKET, CV BOOT, AUTOMATIC AIR CONDITION CONTROL UNIT, RADIO SPEAKERS,
Showing the 5 most serious of 25 complaints filed with NHTSA.
