1999 BUICK CENTURY change time

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Scheduled Maintenance
7-5
The services shown in this schedule up to 100,000 miles
(166 000 km) should be performed after 100,000 miles
(166 000 km) at the same intervals. The services shown
at 150,000 miles (240 000 km) should be performed at
the same interval after 150,000 miles (240 000 km).
See ªOwner Checks and Servicesº and ªPeriodic
Maintenance Inspectionsº following.
Footnotes

The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to the
completion of the vehicle's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the maintenance
be recorded.* Your vehicle has an Engine Oil Life Monitor. This
monitor will show you when to change the engine oil
and filter
-- usually between 3,000 miles (5 000 km) and
7,500 miles (12 500 km) since your last oil change.
Under severe conditions, the indicator may come on
before 3,000 miles (5 000 km). Never drive your vehicle
more than 7,500 miles (12 500 km) or 12 months
without an oil and filter change.
The system won't detect dust in the oil. So if you drive
in a dusty area, be sure to change your oil and filter
every 3,000 miles (5 000 km) or sooner if the CHANGE
OIL SOON light comes on. Remember to reset the Oil
Life Monitor whenever the oil is changed. For more
information, see ªChange Oil Soon Lightº in the Index.
+ A good time to check your brakes is during tire
rotation. See ªBrake System Inspectionº under ªPeriodic
Maintenance Inspectionsº in Part C of this schedule.

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8-8
Courtesy Rental Vehicle
When your vehicle is unavailable due to overnight
warranty repairs, your dealer may arrange to provide you
with a courtesy rental vehicle or reimburse you for a rental
vehicle you obtained, at actual cost, up to a maximum of
$30.00 per day supported by receipts. This requires that
you sign and complete a rental agreement and meet state,
local and rental vehicle provider requirements.
Requirements vary and may include minimum age
requirements, insurance coverage, credit card, etc. You are
responsible for fuel usage charges and may also be
responsible for taxes, levies, usage fees, excessive mileage
or rental usage beyond the completion of the repair.
Generally it is not possible to provide a like
-vehicle as a
courtesy rental.
Additional Program Information
Courtesy Transportation is available during the
Bumper
-to-Bumper warranty coverage period, but it is not
part of the New Vehicle Limited Warranty. A separate
booklet entitled ªWarranty and Owner Assistance
Informationº furnished with each new vehicle provides
detailed warranty coverage information.
Courtesy Transportation is available only at
participating dealerships and all program options, such
as shuttle service, may not be available at every dealer.Please contact your dealer for specific information about
availability. All Courtesy Transportation arrangements
will be administered by appropriate dealer personnel.
Canadian Vehicles: For warranty repairs during the
Complete Vehicle Coverage period of the General
Motors of Canada New Vehicle Limited Warranty,
alternative transportation may be available under the
Courtesy Transportation Program. Please consult your
dealer for details.
General Motors reserves the right to unilaterally modify,
change or discontinue Courtesy Transportation at any time
and to resolve all questions of claim eligibility pursuant to
the terms and conditions described herein at its
sole discretion.
General Motors and participating dealerships reserve
the right to deny a rental vehicle to anyone not
possessing a valid motor vehicle operators license in
their name, anyone who is under the influence of alcohol
or drugs, or anyone whose mental or physical abilities
are impaired so as to be unable to operate a motor
vehicle safely.
Warranty Information
Your vehicle comes with a separate warranty booklet
that contains detailed warranty information.

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8-12
PUBLICATION FORM
NUMBEROrders will be mailed within 10 days of receipt. Please allow adequate time for postal
service. If further information is needed, write to the address shown below or call
1-800-551-4123. Material cannot be returned for credit without packing slip with return
information within 30 days of delivery. On returns, a re-stocking fee may be applied
against the original order. ORDER TOLL FREE
(NOTE: For Credit Card Holders Only)1-800-551-4123(Monday-Friday 8:00 AM ± 6:00 PM EST)
FAX Orders Only 1-313-865-5927
Service Manual
NOTE: Dealers and Companies please provide dealer or company name, and also the
name of the person to whose attention the shipment should be sent.
Mail completed order form to:
HELM, INCORPORATED
P.O. Box 07130
Detroit, MI 48207
For purchases outside U.S.A. please write to the above address for quotation.
1999$90.00
1999
$50.00
1999
$15.00
1999
$10.00
TOTAL MATERIAL
Michigan Purchasers
U.S. Order Processing$5.00
Canadian Postage
GRAND TOTAL
add 6% sales tax
(See Note Below)
GM-BUI-ORD99 *(Prices are subject to change without notice and without incurring
obligation. Allow ample time for delivery.)Note to Canadian Customers: All listed prices are quoted in U.S. funds. Canadian residents
are to make checks payable in U.S. funds. To cover Canadian postage, add $11.50 plus the
U.S. order processing.
(CUSTOMER'S NAME) (ATTENTION)
(STREET ADDRESSÐNO P.O. BOX NUMBERS)
(CITY) (ZIP CODE)
DAYTIME TELEPHONE NO.(STATE)
AREA CODE
( )P
Check or Money
Order payable to
Helm, Inc. (USA funds
only Ð
do not send cash.)
VISA
Discover
Account
Number:
Expiration
Date mo/yr:
CUSTOMER SIGNATURE
S
ITEM DESCRIPTIONNAME YEAR VEHICLE MODEL
QTY.PRICE
EACH*TOTAL
PRICE1
9
9
9
G
M
H
I
P

T
OA
Y
M
E
N
T
Owner's Manual Without Portfolio Owner's Manual In Portfolio Car & Light Truck
Transmission Unit Repair
MasterCard
Check here if your billing address
is different from your shipping
address shown.
PUBLICATION FORM
NUMBER

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9-11
Compact Spare 5-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation 6-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation Check 7-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Rotation 6-43 . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure 6-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Monitor System 6-42 . . . . . . . . . . . . . . . . . . . . . . .
Storing the Flat 5-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storing the Spare 5-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treadwear 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-47 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When It's Time for New 6-45 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-29, 6-44 . . . . . . . . . . . . . . . . . . . . . . . . .
Towing a Trailer 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer
Backing Up 4
-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling When Towing 4-38 . . . . . . . . . . . . . . . . . . .
Following Distance 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If You Decide to Pull A 4-33 . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-38 . . . . . . . . . . . . . . . . . . . . . Making Turns 4
-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passing 4-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signals 4-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight 4-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When You Are Ready to Leave After Parking
on a Hill 4
-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transaxle Fluid 6-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitters, Remote Keyless Entry 2-7, 2-12 . . . . . . . . . . . .
Transportation, Courtesy 8-7 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trip, Before Leaving on a Long 4-22 . . . . . . . . . . . . . . . . . . . .
Trip Odometer 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trunk 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trunk Convenience Net 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trunk Lid Applique Bulb Replacement 6-37 . . . . . . . . . . . . . .
TTY Users 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Lane Change Indicator 2-33 . . . . . . . . . . . . .
Turn Signal On Chime 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal/Multifunction Lever 2-33 . . . . . . . . . . . . . . . . . . .
Turn Signals When Towing a Trailer 4-37 . . . . . . . . . . . . . . . .
Tw o-Way Manual Seat 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Underbody Flushing Service 7-17 . . . . . . . . . . . . . . . . . . . . .
Underbody Maintenance 6-56 . . . . . . . . . . . . . . . . . . . . . . . . .
Underhood Electrical Center (Passenger's Side) 6-62 . . . . . . .