1991 Cadillac Seville Service and Repair Manual

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Covers all 1991 Seville trims — Base Sedan 4-Door, STS Sedan 4-Door ·
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1991 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

  • 4.9L 300Cu. 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
No active recalls The 1991 Cadillac Seville has no recalls on file with NHTSA.
TSB #10246631

Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

TSB #51497

COLD START RATTLE NOISE (DIAGNOSIS/SERVICE PROCEDURE). *TW

TSB #50571

COLD START RATTLE NOISE. *TW

TSB #39308

COLD START RATTLE NOISE. *TW

19980518Component: AIR BAGS:FRONTALCrash reportedFire reported2 injured

VEHCLE WAS HIT IN THE FRONT RIGHT SIDE AT 55MPH BY ANOTHER VEHICLE AND RAN INTO A GUARDRAIL. DRIVER'S SIDE AIRBAG DID NOT DEPLOY. CAR WAS TOTALED. DEALER DID NOT SEE. *AK

19950807Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported5 injured

ABS: WHILE DRIVING DOWN STEEP ROAD, APPLIED BRAKES; PEDAL WENT TO FLOOR; NO BRAKES AT ALL; SHIFTED TO PARK, KEPT PICKING UP SPEED; HIT TWO PARKED CARS. TT

19960429Component: AIR BAGS:FRONTALCrash reported1 injured

MINIVAN STOPPED SUDDENLY, VEHICLE REAR ENDED IT, AIR BAG ON DRIVER'S SIDE DID NOT DEPLOY UPON IMPACT. *AK

19950308Component: SEAT BELTS:FRONT:WEBBINGCrash reported1 injured

DRIVERS SIDE SHOULDER BELT DID NOT ENGAGE PROPERLY WHEN REAR ENDED ANOTHER VEHICLE. TT

Showing the 4 most serious of 28 complaints filed with NHTSA.

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