maintenance schedule BUICK CENTURY 1999 Owner's Guide

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Scheduled Maintenance
7-11
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
90,000 Miles (150 000 km)
Check Oil Life Monitor. If engine oil and filter are changed, reset monitor.
See ªEngine Oilº in the Index.
An Emission Control Service. (See footnote *.)
Replace passenger compartment air filter.
Replace air cleaner filter.
An Emission Control Service.
Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket
for any damage. Replace parts as needed.
An Emission Control Service. (See footnote
.)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
97,500 Miles (162 500 km)
Check Oil Life Monitor. If engine oil and filter are changed, reset monitor.
See ªEngine Oilº in the Index.
An Emission Control Service. (See footnote *.)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

Scheduled Maintenance
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7-12
100,000 Miles (166 000 km)
Inspect spark plug wires.
An Emission Control Service.
Replace spark plugs.
An Emission Control Service.
Change automatic transaxle fluid and filter if the vehicle is mainly driven
under one or more of these conditions:
± In heavy city traffic where the outside temperature regularly reaches 90
F
(32
C) or higher.
± In hilly or mountainous terrain.
± When doing frequent trailer towing.
± Uses such as found in taxi, police or delivery service.
If you haven't used your vehicle under severe service conditions listed
previously and, therefore, haven't changed your automatic transaxle fluid,
change both the fluid and filter.ACTUAL
SERVICED BY:MILEAGE
DATE

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Scheduled Maintenance
7-13
150,000 Miles (240 000 km)

Drain, flush and refill cooling system (or every 60 months since last service,
whichever occurs first). See ªEngine Coolantº in the Index for what to use.
Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test
the cooling system and pressure cap.
An Emission Control Service.ACTUAL
SERVICED BY:MILEAGE
DATE

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7-21
Part E: Maintenance Record
After the scheduled services are performed, record the
date, odometer reading and who performed the service
in the boxes provided after the maintenance interval.Any additional information from ªOwner Checks and
Servicesº or ªPeriodic Maintenanceº can be added on
the following record pages. Also, you should retain all
maintenance receipts. Your owner information portfolio
is a convenient place to store them.
Maintenance Record
DATEODOMETER
READINGSERVICED BYMAINTENANCE PERFORMED

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8-11
CURRENT PUBLICATIONS FOR 1999 BUICK
SERVICE MANUALS
Service Manuals have the diagnosis and repair information
on engines, transmission, axle, suspension, brakes,
electrical, steering, body, etc.
RETAIL SELL PRICE: $90.00
TRANSMISSION, TRANSAXLE, TRANSFER CASE
UNIT REPAIR MANUAL
This manual provides information on unit repair service
procedures, adjustments and specifications for the
1999 GM transmissions, transaxles and transfer cases.
RETAIL SELL PRICE: $50.00
SERVICE BULLETINS
Service Bulletins give technical service information needed
to knowledgeably service General Motors cars and trucks.
Each bulletin contains instructions to assist in the
diagnosis and service of your vehicle.OWNER'S INFORMATION
Owner publications are written directly for Owners and
intended to provide basic operational information about the
vehicle. The owner's manual will include the Maintenance
Schedule for all models.
In-Portfolio: Includes a Portfolio, Owner's Manual and
Warranty Booklet.
RETAIL SELL PRICE: $15.00
Without Portfolio: Owner's Manual only.
RETAIL SELL PRICE: $10.00
CURRENT & PAST MODEL ORDER FORMS
Service Publications are available for current and past
model GM vehicles. To request an order form, please
specify year and model name of the vehicle.
PLEASE COMPLETE THE ORDER FORM SHOWN ON
THE FOLLOWING PAGE AND MAIL TO:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207OR ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM ± 6:00 PM Eastern Time
For Credit Card Orders Only (VISA±MasterCard±Discover)
1999 BUICK SERVICE PUBLICATIONS ORDERING INFORMATION
The following publications covering the operation and servicing of your vehicle can be purchased by filling out
the Service Publication Order Form in this book and mailing it in with your check, money order,
or credit card information to Helm, Incorporated (address below.)

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9-7
Rear-Door Child Security 2-6 . . . . . . . . . . . . . . . . . . . . . . .
Trunk 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Window 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Control 4-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low
Coolant Warning Light 2
-56, 6-23 . . . . . . . . . . . . . . . . . . . .
Fuel Light 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level Light 2-61, 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Light 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction Light 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid Warning Light 2-35, 2-63 . . . . . . . . . . . . . . .
Low-Beam Headlamps 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-15 . . . . . . . . . . . . . . . . . . . . . . . .
Magnetic Variable Effort Steering4-10 . . . . . . . . . . . . . . .
Maintenance, Normal Replacement Parts 6-65 . . . . . . . . . . . .
Maintenance Record 7-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Schedule 7-1, 7-5 . . . . . . . . . . . . . . . . . . . . . . . .
How it's Organized 7-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 7-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-14 . . . . . . . . . . . . . . . . . . . . .
Recommended Fluids and Lubricants 7-20 . . . . . . . . . . . . .
Periodic Maintenance Inspections 7-18 . . . . . . . . . . . . . . . .
Scheduled Maintenance Services 7-4 . . . . . . . . . . . . . . . . . .
Your Vehicle and the Environment 7-2 . . . . . . . . . . . . . . . .
Maintenance, Underbody 6-56 . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Trailer Towing 4-38 . . . . . . . . . . . . . . . . .
Malfunction Indicator Lamp 2-58 . . . . . . . . . . . . . . . . . . . . . .
Manual
Door Locks 2
-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Seat 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Single Zone Climate Control 3
-2 . . . . . . . . . . . . . . . .
Methanol 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mirrors 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Dimming/Heated Outside Rearview 2-44 . . . . .
Convex Outside 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview 2-43 . . . . . . . . . . . . . .
Power Outside Foldaway 2-43 . . . . . . . . . . . . . . . . . . . . . . .
Visor Vanity 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MMT 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mountain Roads 4-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multifunction Lever 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net, Trunk Convenience 2-45 . . . . . . . . . . . . . . . . . . . . . . . .
Neutral, Automatic Transaxle 2-22 . . . . . . . . . . . . . . . . . . . . .
New Vehicle ªBreak-Inº 2-16 . . . . . . . . . . . . . . . . . . . . . . . . .
Night Vision 4-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer, Trip 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offices, Customer Assistance 8-4 . . . . . . . . . . . . . . . . . . . . . .
Off-Road Recovery 4-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil, Engine 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Warning Light 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OnStar
2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overdrive, (
) Automatic 2-23 . . . . . . . . . . . . . . . . . . . . . . . .
Overheated Engine Protection Operating Mode 5-9 . . . . . . . .
Overheating Engine 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-9
Replacement, Bulbs 6-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Parts 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Wheel 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reporting Safety Defects 8-9, 8-10 . . . . . . . . . . . . . . . . . . . . .
Restraints
Checking 1
-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Parts After a Crash 1-53 . . . . . . . . . . . . . . . . . . .
System Check 7-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restraints, Child 1-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resynchronization, Remote Keyless Entry 2-13 . . . . . . . . . . .
Reverse, Automatic Transaxle 2- 22 . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-19 . . . . . . . . . . . . . . . . . . . .
Roadside Assistance 8-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roadside Assistance, Canadian 8-6 . . . . . . . . . . . . . . . . . . . . .
Rocking Your Vehicle 5-33 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotation, Tires 6-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belts 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adults 1-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center Passenger Position 1-26 . . . . . . . . . . . . . . . . . . . . . .
Children 1-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Position 1-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extender 1-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Wear Properly 1-10 . . . . . . . . . . . . . . . . . . . . . . . . .
Incorrect Usage 1-14, 1-51 . . . . . . . . . . . . . . . . . . . . . . . . .
Lap Belt 1-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lap-Shoulder 1-11, 1-28, 1-50 . . . . . . . . . . . . . . . . . . . . . .
Larger Children 1-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Questions and Answers 1-9 . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Comfort Guides 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . . Rear Seat Outside Passenger Positions 1
-28 . . . . . . . . . . . .
Rear Seat Passengers 1-27 . . . . . . . . . . . . . . . . . . . . . . . . . .
Reminder Light 1-5, 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing After a Crash 1-53 . . . . . . . . . . . . . . . . . . . . . . . .
Right Front Passenger Position 1-19 . . . . . . . . . . . . . . . . . .
Shoulder Belt Height Adjuster 1-13 . . . . . . . . . . . . . . . . . . .
Smaller Children and Babies 1-34 . . . . . . . . . . . . . . . . . . . .
Use During Pregnancy 1-18 . . . . . . . . . . . . . . . . . . . . . . . . .
Why They Work 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belts, Care 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Defects, Reporting 8-9, 8-10 . . . . . . . . . . . . . . . . . . . .
Safety Warnings and Symbols iii. . . . . . . . . . . . . . . . . . . . . . .
Scheduled Maintenance Services 7
-4 . . . . . . . . . . . . . . . . . . . .
Seatback
Reclining Front 1
-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seats
Manual Front 1
-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restraint Systems 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Controls 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing a Child Restraint 1-43 . . . . . . . . . . . . . . . . . . . . . .
Six-Way Power 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tw o-Way Manual 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Gear, Automatic Transaxle 2-24 . . . . . . . . . . . . . . . . .
Security
Feedback 2
-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .