2003 Buick Century Service and Repair Manual

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Factory-Grade Data

2003 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

  • Custom Sedan 4-Door

Engines covered

  • 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

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Vehicle Safety Data

2003 Buick Century Recalls & Complaints

NHTSA #09E00500017/02/2009Component: STEERING

DORMAN IS RECALLING 979 STEERING KNUCKLES, DORMAN P/NOS. 697-902 AND 697-903, SOLD UNDER DORMAN'S "OE SOLUTIONSTM" BRAND NAME, AND NAPA P/NOS. 7-8502 AND 7-8503 WHICH WERE SOLD FOR REPLACEM

Consequence

A BROKEN STEERING KNUCKLE COULD RESULT IN LOSS OF STEERING CONTROL AND A POSSIBLE CRASH WITHOUT WARN

Remedy

DORMAN WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE STEERING KNUCKLES FREE OF CHARGE AND REIMBURSE T

TSB #11020816

This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.

TSB #11014455

This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the

TSB #11009156

This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and

TSB #11007744

This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have hi

TSB #11007743

This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have hi

TSB #11007208

This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed fo

TSB #11006621

Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected mo

TSB #11006421

GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the deal

Showing the 8 most recent of 400 technical service bulletins on file with NHTSA.

20070222Component: WHEELSCrash reported1 injured

TL*- THE CONTACT STATED THAT WHILE DRIVING THE 2003 BUICK CENTURY WITH 50000 FAILURE MILEAGE AT 55 MPH AND GOING AROUND A SOFT LEFT CURVE THE FRONT WHEELS TURNED, BUT THE BACK WHEELS LOST TRACTION

20160201Component: VEHICLE SPEED CONTROLCrash reported

TL* THE CONTACT OWNS A 2003 BUICK CENTURY. THE CONTACT STATED THAT THE VEHICLE EXPERIENCED UNINTENDED ACCELERATION WHEN SHIFTED. AS A RESULT, THE CONTACT CRASHED INTO A CURB AND CONTINUED DOWN A LAWN.

20160122Component: STRUCTURE:BODYCrash reported

I HAD DRIVEN MY 2003 BUICK CENTURY AT LEAST HALFWAY INTO A PARKING SPACE IN A PARKING LOT WHEN IT SUDDENLY LURCHED FORWARD LIKE A BAT OUT OF HELL, LEAPING UP OVER A CURB ON AN UPWARD SLOPE, SWIPING A

20160122Component: ELECTRICAL SYSTEMCrash reported

I HAD DRIVEN MY 2003 BUICK CENTURY AT LEAST HALFWAY INTO A PARKING SPACE IN A PARKING LOT WHEN IT SUDDENLY LURCHED FORWARD LIKE A BAT OUT OF HELL, LEAPING UP OVER A CURB ON AN UPWARD SLOPE, SWIPING A

20160122Component: VEHICLE SPEED CONTROLCrash reported

I HAD DRIVEN MY 2003 BUICK CENTURY AT LEAST HALFWAY INTO A PARKING SPACE IN A PARKING LOT WHEN IT SUDDENLY LURCHED FORWARD LIKE A BAT OUT OF HELL, LEAPING UP OVER A CURB ON AN UPWARD SLOPE, SWIPING A

Showing the 5 most serious of 170 complaints filed with NHTSA.

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