1986 Buick Somerset Service and Repair Manual
1986 Buick Somerset 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
- T-Type Coupe 2-Door
- Custom Coupe 2-Door
- Limited Coupe 2-Door
Engines covered
- 3.0L 181Cu. In. V6 GAS OHV Naturally Aspirated
- 2.5L 2474CC 151Cu. In. l4 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
CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURE
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I
HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB
INFORMATION REGARDING SNOW INTRUSION INTO REAR DRUM BRAKE ASSEMBLIES. **MR
THE PAINT IS RUSTING BEHIND THE SURFACE, CONSUMER BELIEVES THIS VEHICLE SHOULD BE RECALLED. NLM
TIRE'S ON VEHICLE (UNIROYAL RALLYE HP 205/70R 13MS), HAVE ALL SHOWN SIGNS OF FLAWS, BULGE AND SEPARATION CAUSING FAILURE. MJS
ENGINE FROZE DUE TO A PUNCTURED OIL FILTER CAUSED BY A DESIGN FLAW. THE OIL FILTER IS ON THE BOTTOM OF ENGINE AND HANGS 2-3 INCHES BELOW THE FRAME.
THE ELECTRIC IGNITION MODULE KEEPS GOING OUT. REPLACED (4) TIMES IN THE LAST (5) YEARS.*AK
RACK AND PINION STEERING STICKS. PLEASE DESCRIBE. TT
Showing the 5 most serious of 7 complaints filed with NHTSA.
