1985 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
- Elegante Sedan 4-Door
- Base Sedan 4-Door
Engines covered
- 4.1L 250Cu. In. V8 GAS 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
A SMALL NYLON BUSHING IN THE CRUISE CONTROL SERVO BAIL MAY SLIP OUT OF PLACE, CAUSING INTERMITTENT AND UNEXPECTED INCREASES IN ENGINE SPEED OR DIESELING (ENGINE RUN ON WITH IGNITION OFF).
SERVO ROD ASSEMBLY COULD CATCH ON ENGINE COMPONENTS ANDRESULT IN A STUCK THROTTLE WITH POTENTIAL FOR
INSTALL A NEW BUSHING IN CRUISE CONTROL SERVO BAIL.
I HAVE A 1985 CADILLAC STS WITH ONLY 70,000 MILES ON IT. IT IS HOUSED IN A GARAGE AT ALL TIMES AND IN VERY GOOD CONDITION. I HAVE IT AT MY MECHANIC'S AS I WRITE THIS. I WAS INFORMED THAT THE HORRIF
ENGINE BLOCK CORROSION. (1ST VEHICLE ON 602403)
SUDDEN ACCELERATION.
THE ENGINE ACCELERATES ALL BY ITSELF WHICH COULD CAUSE AN ACCIDENT IF ANOTHER AUTOS IN FRONT OF YOU. TT
POWER STEERING FAILED. *DH
Showing the 5 most serious of 6 complaints filed with NHTSA.
