1993 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
- Special Sedan 4-Door
- Custom Wagon 4-Door
- Special Wagon 4-Door
- Custom Coupe 2-Door
- Custom Sedan 4-Door
- Limited Sedan 4-Door
Engines covered
- 2.2L 2190CC 134Cu. In. l4 GAS OHV Naturally Aspirated
- 3.3L 204Cu. In. V6 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
THE BRAKE HOSES WERE MANUFACTURED INCORRECTLY, AND DO NOT COMPLY WITH FMVSS 106, "BRAKE HOSES."
THE IMPROPERLY MANUFACTURED BRAKE HOSES CAN CAUSEREDUCED BRAKE EFFECTIVENESS AND/OR UNEVEN BRAKING,
REPLACE THE RIGHT FRONT BRAKE HOSE ASSEMBLY ON CIERA AND CENTURY MODELS, AND BOTH REAR BRAKE HOSES O
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.
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
OWNERS OF SOME VEHICLES EQUIPPED WITH HYDRA-MATIC 3T40, 4T60, 4T60-E OR 4T65-E TRANSAXLES MAY COMMENT ON A GRINDING AND / OR GROWLING NOISE THAT IS NOTICEABLE WHEN STANDING IN PARK ON A HILL OR SLOPE WITH THE ENGINE RUNNING AND THE PARKING
SOME VEHICLES EQUIPPED WITH HYDRA-MATIC 3T40, 4T60 OR 4T60-E TRANSXALES MAY COMMENT ON A GRINDING AND / OR GROWLING NOISE THAT IS NOTICEABLE WHEN IN PARK ON INCLINE. *TT
VEHICLES MAY EXHIBIT A CLATTERING NOISE AT IDLE SPEED ORIGINATING FROM THE TIMING CHAIN AND FRONT COVER AREA. *YC
GRINDING AND/OR GROWLING NOISE IN PARK ON INCLINE.*SD
WAS DRIVING ON HIGHWAY GOING ABOUT 60MPH WHEN 18-WHEELER TRACTOR TRAILER CROSSED INTO BUICK'S LANE. THE VEHICLE STRUCK THE TRACTOR TRAILER. UPON IMPACT, THE AIR BAGS DID NOT DEPLOY. THE INSURANCE PIC
WHILE TRAVELING AT 40 MPH THIS VEHICLE STRUCK ANOTHER VEHICLE HEAD-ON, AND AIR BAGS DID NOT DEPLOY. BUICK HAS BEEN CONTACTED.*AK
AT 50 MPH , DRIVER HIT CEMENT PILLAR WHICH DAMAGED ENTIRE FRONT END. UPON IMPACT, DRIVER'S SIDE AIRBAG DID NOT DEPLOY, CAUSING INJURIES. *AK
W/IGNITION OFF AND KEYS REMOVED TWO YEAR OLD CHILD MOVED GEAR SHIFT LEVER, CAUSING VEHICLE TO ROLL/ACCIDENT.
DURING A FRONT ACCIDENT AT 35 MPH, THE DRIVERS SIDE AIR BAG DID NOT DEPLOY.*AK
Showing the 5 most serious of 71 complaints filed with NHTSA.
