1990 Cadillac Seville Service and Repair Manual

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Factory-Grade Data

1990 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
  • STS Sedan 4-Door

Engines covered

  • 4.5L 273Cu. 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

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Vehicle Safety Data

1990 Cadillac Seville Recalls & Complaints

NHTSA #90E04300430/10/1990Component: AIR BAGS:FRONTAL

THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.

Consequence

INFLATOR COMPONENT SEPARATION ALLOWS HOT COMBUSTION GASESTO ESCAPE INTO THE PASSENGER COMPARTMENT WH

Remedy

REPLACE AIR BAG MODULES CONTAINING POTENTIALLY DEFECTIVE INFLATORS.

NHTSA #90V02800012/02/1990Component: SEAT BELTS:FRONT:RETRACTOR

MISALIGNED REAR SEAT SAFETY BELT SHOULDER RETRACTOR ASSEMBLIES COULD CAUSE PENDULUM INTERFERENCE, CAUSING THE BELT TO REMAIN IN LOCKED POSITION OR TO TRAVEL FREELY WITHOUT LOCKING.

Consequence

IN THE EVENT OF A PANIC STOP OR ACCIDENT, IF THE BELT RETRACTOR INERTIA LOCK DOES NOT ENGAGE, THE RE

Remedy

REALIGN REAR SHOULDER BELT RETRACTOR ASSEMBLY.

NHTSA #90V16400006/09/1990Component: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFT

TRANSAXLE SHIFT CONTROL CABLE MAY DISENGAGE FROM THE FROM THE FLOOR SHIFT CONTROL WITH LOSS OF GEAR INDICATOR REFERENCE AND SHIFT SELECTOR OPERATION.

Consequence

DRIVER WOULD NOT BE ABLE TO DETERMINE ACTUAL GEARPOSITION THE TRANSAXLE IS IN, WHICH COULD RESULT IN

Remedy

INSTALL A TRANSAXLE SHIFT CONTROL CABLE RETAINING CLIP TO PREVENT CABLE DISENGAGEMENT.

No service bulletins No technical service bulletins on file with NHTSA for the 1990 Cadillac Seville.
19971214Component: VEHICLE SPEED CONTROLCrash reported

THROTTLE STUCK OPEN, CAUSING AN ACCIDENT.

19970603Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

SLAMMED ON BRAKES, VEHICLE STARTED SLIDING, CRASHED INTO ANOTHER VEHICLE, HAPPENED AGAIN, MAY 29, 1997, NOT CHECKED BY DEALERSHIP. *AK

19950929Component: SEATS:FRONT ASSEMBLY:HEAD RESTRAINTCrash reported

DRIVER'S SIDE SEAT HEAD REST BROKE WHILE INVOLVED IN REAR END COLLISION. TT

19950306Component: PARKING BRAKE:CONVENTIONAL1 injured

PARKING EMERGENCY BRAKE FAILED TO RELEASE WHEN ENGAGED OUT OF PARK. FINGER SMASHED BETWEEN (2) GEARS W/PART GOING THROUGH FINGERNAIL. PLEASE DESCRIBE DETAILS.

20120113Component: SERVICE BRAKES, HYDRAULIC

I BOUGHT A NEW 1990 CADILLAC FROM CADILLAC DEALER IN 1990 THAT I HAVE DRIVEN ONLY 53,678 MILES, WELL CARED FOR AND GARAGED. .THE ABS MASTER BRAKE CYLINDER HAS BEEN LEAKING FOR SOME TIME AND I HAVE CO

Showing the 5 most serious of 24 complaints filed with NHTSA.

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