reset BUICK CENTURY 2004 Owner's Guide

Scheduled Maintenance
When the CHANGE OIL SOON light comes on, it
means that service is required for your vehicle. Have
your vehicle serviced as soon as possible within the
next 600 miles (1 000 km). It is possible that, if you
are driving under the best conditions, the engine oil
life system may not indicate that vehicle service
is necessary for over a year. However, your engine oil
and lter must be changed at least once a year and
at this time the system must be reset. Your GM
Goodwrench dealer has GM-trained service technicians
who will perform this work using genuine GM parts
and reset the system.
If the engine oil life system is ever reset accidentally,
you must service your vehicle within 3,000 miles
(5 000 km) since your last service. Remember to reset
the oil life system whenever the oil is changed. See
Engine Oil on page 5-13for information on the Engine
Oil Life System and resetting the system.When the CHANGE OIL SOON light appears,
certain services, checks and inspections are required.
Required services are described in the following for
“MaintenanceI” and “MaintenanceII.” Generally,
it is recommended that your rst service be
MaintenanceI, your second service be MaintenanceII
and that you alternate MaintenanceIand MaintenanceII
thereafter. However, in some cases, MaintenanceII
may be required more often.
MaintenanceI— Use MaintenanceIif the light comes
on within ten months since vehicle was purchased or
MaintenanceIIwas performed.
MaintenanceII— Use MaintenanceIIif the previous
service performed was MaintenanceI. Always use
MaintenanceIIwhenever the light comes on ten months
or more since the last service or if the light has not
come on at all for one year.
6-4

Service MaintenanceIMaintenanceII
Change engine oil and lter. Reset oil life system. SeeEngine Oil on
page 5-13.An Emission Control Service.••
Visually check for any leaks or damage.See footnote (k).••
Inspect engine air cleaner lter. If necessary, replace lter. SeeEngine Air
Cleaner/Filter on page 5-18.An Emission Control Service. See footnote †.••
Rotate tires and check ination pressures and wear. SeeTires on page 5-57.••
Inspect brake system.See footnote (a).••
Check engine coolant and windshield washer uid levels and add uid as
needed.••
Perform any needed additional services. See “Additional Required Services” in
this section.••
Inspect suspension and steering components.See footnote (b).•
Inspect engine cooling system.See footnote (c).•
Inspect wiper blades.See footnote (d).•
Inspect restraint system components.See footnote (e).•
Lubricate body components.See footnote (f).•
Check transaxle uid level and add uid as needed.•
Replace passenger compartment air lter.See footnote (g).•
Inspect throttle system.See footnote (j).•
6-5

Service Manuals.............................................7-11
Setting Preset Stations............................3-47, 3-54
Setting the Time.............................................3-45
Setting the Tone (Bass/Treble)..................3-47, 3-54
Sheet Metal Damage.......................................5-93
Shifting Into Park (P).......................................2-26
Shifting Out of Park (P)...................................2-28
Shoulder Belt Height Adjuster...........................1-14
Skidding........................................................4-15
Some Other Rainy Weather Tips.......................4-19
Special Fabric Cleaning Problems.....................5-89
Specications, Capacities...............................5-103
Speedometer..................................................3-29
Split Folding Rear Seat..................................... 1-5
Starting Your Engine.......................................2-20
Steering........................................................4-10
Steering in Emergencies..................................4-11
Steering Tips..................................................4-10
Steering Wheel Controls, Audio.........................3-62
Storage Areas
Center Console Storage Area........................2-35
Convenience Net.........................................2-35
Front Storage Area......................................2-34
Glove Box..................................................2-34
Storing the Flat Tire and Tools..........................5-85
Storing the Spare Tire and Tools.......................5-86
Stuck in Sand, Mud, Ice or Snow......................4-30
Sun Visors.....................................................2-17
Sunroof.........................................................2-36T
Taillamps
Turn Signal, and Stoplamps..........................5-54
Theft-Deterrent, Radio.....................................3-62
Theft-Deterrent Systems...................................2-17
PASS-Key
®II ..............................................2-17
Tilt Wheel........................................................ 3-5
Tire
Pressure Light.............................................3-36
Tire Ination Check........................................... 6-9
Tire Sidewall Labeling......................................5-58
Tire Size.......................................................5-61
Tire Terminology and Denitions........................5-62
Tires.............................................................5-57
Buying New Tires........................................5-69
Chains.......................................................5-73
Changing a Flat Tire....................................5-75
Compact Spare Tire.....................................5-87
If a Tire Goes Flat.......................................5-74
Ination - Tire Pressure................................5-64
Inspection and Rotation................................5-67
Pressure Monitor System..............................5-65
Uniform Tire Quality Grading.........................5-70
Wheel Alignment and Tire Balance.................5-71
Wheel Replacement.....................................5-72
When It Is Time for New Tires......................5-68
To Use the Engine Coolant Heater....................2-21
Top Strap......................................................1-38
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