1987 Cadillac Seville 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
- Base Sedan 4-Door
Engines covered
- 4.1L 250Cu. In. V8 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
THE TWILIGHT SENTINEL POTENTIOMETER (THUMBWHEEL CONTROL) MIGHT HAVE BEEN MANUFACTURED WITH ELECTRICAL CONTACTS WHICH COULD RESULT IN AN INTERMITTENT HEADLIGHT CIRCUIT.
WITH THE TWILIGHT SENTINEL SYSTEM ON, THE INTERMITTENTCIRCUIT COULD CAUSE HEADLIGHT AND INSTRUMENT P
INSTALL A NEW PART IN ONE OF THE VEHICLES CONTROL COMPUTERS TO PREVENT THIS CONDITION FROM OCCURING.
P300 020 ; CONSUMER WAS TRAVELING ABOUT 59MPH ON A HIGHWAY AND HEARD A POOPYING NOISE. SHE WAS ABLE TO PULL OVER TO SHOULDER AND NOTICED THAT PASSENGER'S REAR BACK TIRE TREAD SEPARATED. TREAD WAS IN
THIS VEHICLE HAS A BAD HEADLIGHT SENTINEL THAT CAUSES ERRATIC OPERATION OF THE HEADLIGHTS, THEY COULD SHUT DOWN WITHOUT WARNING. DEALER HAS BEEN CONTACTED. *AK
THE PLASTIC COATING ON WINDSHIELD IS RIPPLED AND WAVY; VISION IS OBSTRUCTED, PARTICULARLY IN SUNLIGHT, AND CAR CANNOT BE DRIVEN AT NIGHT AT ALL. *AK
REAR SEAT BELTS ARE TOO SHORT. WON'T GO AROUND A 38" WAIST. *AK
ENGINE FAILED.
Showing the 5 most serious of 14 complaints filed with NHTSA.
