1990 Buick Century Service and Repair Manual

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Covers all 1990 Century trims — Limited Wagon 4-Door, Base Sedan 4-Door, Custom Wagon 4-Door +3 more ·
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1990 Buick Century 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

  • Limited Wagon 4-Door
  • Base Sedan 4-Door
  • Custom Wagon 4-Door
  • Custom Coupe 2-Door
  • Custom Sedan 4-Door
  • Limited Sedan 4-Door

Engines covered

  • 3.3L 204Cu. In. V6 GAS OHV Naturally Aspirated
  • 2.5L 2474CC 151Cu. In. l4 GAS OHV Naturally Aspirated
  • 3.1L 189Cu. In. V6 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
NHTSA #95V17300015/09/1995Component: SEAT BELTS:FRONT:ANCHORAGE

THESE VEHICLES WERE ASSEMBLED WITH REAR OUTBOARD SAFETY BELT ANCHORAGES THAT MAY NOT WITHSTAND THE REQUIRED LOAD. THIS DOES NOT COMPLY WITH FMVSS NO.210, "SEAT BELT ASSEMBLY ANCHORAGES."

Consequence

CONSEQUENCE OF NON-COMPLIANCE: IN A COLLISON, STRESS CAN CAUSE THE ATTACHMENT METAL TO TEAR AND ALL

Remedy

DEALERS WILL REPLACE THE EXISTING ANCHOR BOLTS WITH A NEW SHOULDER BOLT AND THREAD LOCKING ADHESIVE.

No service bulletins No technical service bulletins on file with NHTSA for the 1990 Buick Century.
19960328Component: SEAT BELTS:FRONT:BUCKLE ASSEMBLYCrash reported1 injured

SEAT BELT; FAILURE ON THE DRIVER AND PASSENGER SIDE SEAT BELTS, CONSUMER WAS IN A ACCIDENT AND THE DRIVER AND PASSENGER SIDE SEAT BELT DID NOT LOCK. *AK

20021011Component: ENGINE AND ENGINE COOLING:ENGINEFire reported

CONSUMER STATES THAT WHILE DRIVING AND WITHOUT WARNING THE ENGINE BLEW AND THE VEHICLE STARTED TO SMOKE UNDER THE HOOD CAUSING THE CONSUMER TO PULL OVER. DEALER NOTIFIED. MR

19960910Component: FUEL SYSTEM, GASOLINE:CARBURETOR SYSTEMFire reported

CARBURETOR BACKFIRED STARTING A FIRE, THE ELECTRICAL FUEL PUMP CONTINUES TO PUMP FUEL, CAUSING THE CAR TO COMPLETELY BURN.

19960910Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMPFire reported

CARBURETOR BACKFIRED STARTING A FIRE, THE ELECTRICAL FUEL PUMP CONTINUES TO PUMP FUEL, CAUSING THE CAR TO COMPLETELY BURN.

19960715Component: ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOODFire reported

WHILE DRIVING, HEARD NOISE, WITHIN MINUTES, ALL POWER STOPPED, BLACK SMOKE POURED OUT FROM UNDERHOOD, FIRE STARTED COMING FROM UNDER VEHICLE, NO WARNING. *AK

Showing the 5 most serious of 49 complaints filed with NHTSA.

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