1986 Buick Skylark 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 Sedan 4-Door
- Limited Sedan 4-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
UNDER EXTENDED HEADLAMP USAGE, CIRCUITRY IN THE HEADLAMP SWITCH PANEL MIGHT EXPERIENCE INCREASED RESISTANCE AND EXCESSIVE HEAT BUILDUP.
HEADLIGHTS WOULD CYCLE ON AND OFF. SUDDEN LOSS OFHEADLIGHTS UNDER SEVERE WEATHER OR NIGHTIMER DRIVI
REPLACE HEADLIGHT SWITCH WITH MODIFIED SWITCH.
INFORMATION REGARDING SNOW INTRUSION INTO REAR DRUM BRAKE ASSEMBLIES. **MR
I AM A COLLEGE STUDENT. I COMMUTE ABOUT 50 MILES TO SCHOOL AND BACK. I WAS IN BRICK NJ ON RT 70 ABOUT TO ENTER THE PARKWAY WHEN I SAW SMOKE COMING OUT OF MY HOOD. BEFORE THIS HAPPENED I WAS USING G
I AM A COLLEGE STUDENT. I COMMUTE ABOUT 50 MILES TO SCHOOL AND BACK. I WAS IN BRICK NJ ON RT 70 ABOUT TO ENTER THE PARKWAY WHEN I SAW SMOKE COMING OUT OF MY HOOD. BEFORE THIS HAPPENED I WAS USING G
ELECTRONIC DASHBOARD FAILURE.
SEAT BELT RETRACTORS FOR BOTH LEFT AND RIGHT SIDE INOPERABLE, RENDERING SEATBELT UNUSABLE. THE PLUNGER ACTIVATED BY THE CLOSING OF FRONT CAR DOORS HAS A CABLE ATTATCHED TO RELEASE THE BELTS. THE CAB
WATER PUMP FAILED.
Showing the 5 most serious of 10 complaints filed with NHTSA.
