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
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 OF NON-COMPLIANCE: IN A COLLISON, STRESS CAN CAUSE THE ATTACHMENT METAL TO TEAR AND ALL
DEALERS WILL REPLACE THE EXISTING ANCHOR BOLTS WITH A NEW SHOULDER BOLT AND THREAD LOCKING ADHESIVE.
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
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
CARBURETOR BACKFIRED STARTING A FIRE, THE ELECTRICAL FUEL PUMP CONTINUES TO PUMP FUEL, CAUSING THE CAR TO COMPLETELY BURN.
CARBURETOR BACKFIRED STARTING A FIRE, THE ELECTRICAL FUEL PUMP CONTINUES TO PUMP FUEL, CAUSING THE CAR TO COMPLETELY BURN.
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.
