2003 BUICK CENTURY air filter

30,000 Miles (50 000 km)
qReplace passenger compartment air ®lter. If you
drive regularly under dusty conditions, the ®lter
may require replacement more often.
qRotate tires. See
Tire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
qReplace engine air cleaner ®lter. SeeEngine Air
Cleaner/Filter on page 5-18for more information.An Emission Control Service.
37,500 Miles (62 500 km)
qRotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
45,000 Miles (75 000 km)
qInspect engine air cleaner ®lter. If necessary, replace
the ®lter. If vehicle is driven in dusty/dirty conditions,
inspect ®lter at every engine oil change. See
Engine
Air Cleaner/Filter on page 5-18for more information.An Emission Control Service. (See footnote ².)
qReplace passenger compartment air ®lter. If you drive
regularly under dusty conditions, the ®lter may require
replacement more often.
qRotate tires. See
Tire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
50,000 Miles (83 000 km)
qChange automatic transaxle ¯uid and ®lter if the
vehicle is mainly driven under one or more of
these conditions:
þ In heavy city traffic where the outside
temperature regularly reaches 90ÉF (32ÉC) or
higher.
þ In hilly or mountainous terrain.
þ When doing frequent trailer towing.
þ Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the ¯uid and ®lter at 100,000 miles
(166 000 km).
6-7

52,500 Miles (87 500 km)
qRotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
60,000 Miles (100 000 km)
qReplace passenger compartment air ®lter. If you
drive regularly under dusty conditions, the ®lter
may require replacement more often.
qRotate tires. See
Tire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
qReplace engine air cleaner ®lter. SeeEngine Air
Cleaner/Filter on page 5-18for more information.An Emission Control Service.
67,500 Miles (112 500 km)
qRotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
75,000 Miles (125 000 km)
qInspect engine air cleaner ®lter. If necessary, replace
the ®lter. If vehicle is driven in dusty/dirty conditions,
inspect ®lter at every engine oil change. See
Engine Air Cleaner/Filter on page 5-18for more
information.An Emission Control Service. (See
footnote ².)
qReplace passenger compartment air ®lter. If you
drive regularly under dusty conditions, the ®lter
may require replacement more often.
qRotate tires. See
Tire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
82,500 Miles (137 500 km)
qRotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
6-8

90,000 Miles (150 000 km)
qReplace passenger compartment air ®lter. If you
drive regularly under dusty conditions, the ®lter
may require replacement more often.
qReplace engine air cleaner ®lter. See
Engine Air
Cleaner/Filter on page 5-18for more information.An Emission Control Service.
qRotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
97,500 Miles (162 500 km)
qRotate tires. SeeTire Inspection and Rotation on
page 5-60for proper rotation pattern and additional
information.(See footnote .) (See footnote +.)
100,000 Miles (166 000 km)
qInspect spark plug wires.An Emission Control
Service.
qReplace spark plugs.An Emission Control Service.
qChange automatic transaxle ¯uid and ®lter if the
vehicle is mainly driven under one or more of
these conditions:
þ In heavy city traffic where the outside
temperature regularly reaches 90ÉF (32ÉC)
or higher.
þ In hilly or mountainous terrain.
þ When doing frequent trailer towing.
þ Uses such as found in taxi, police or delivery
service.
qIf you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transaxle ¯uid, change both
the ¯uid and ®lter.
150,000 Miles (240 000 km)
qDrain, ¯ush and re®ll cooling system (or every
60 months since last service, whichever occurs ®rst).
See
Engine Coolant on page 5-23for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
qInspect engine accessory drive belt.An Emission
Control Service.
6-9

A
Activating the Theft-Deterrent Feature................3-48
Adding Washer Fluid.......................................5-38
Additional Program Information........................... 7-9
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-88
Adjusting the Speakers (Balance/Fade)......3-41, 3-44
Air Bag Systems.............................................1-53
How Does an Air Bag Restrain?....................1-59
Servicing Your Air Bag-Equipped Vehicle.........1-62
What Makes an Air Bag In¯ate?....................1-59
What Will You See After an Air Bag In¯ates?......1-60
When Should an Air Bag In¯ate?...................1-58
Where Are the Air Bags?..............................1-56
Air Bag .........................................................3-25
Readiness Light..........................................3-25
Air Cleaner/Filter, Engine.................................5-18
AM-FM Radio.................................................3-40
AM ...............................................................3-50
Antenna, Fixed Mast.......................................3-52
Anti-lock Brake System (ABS)............................ 4-7
Anti-Lock Brake, System Warning Light..............3-28
Appearance Care............................................5-79
Care of Safety Belts....................................5-82
Chemical Paint Spotting...............................5-85
Cleaning the Inside of Your Vehicle................5-79Appearance Care (cont.)
Cleaning the Outside of Your Vehicle..............5-82
Finish Damage............................................5-84
Sheet Metal Damage...................................5-84
Underbody Maintenance...............................5-85
Vehicle Care/Appearance Materials................5-85
Weatherstrips..............................................5-82
Ashtrays........................................................3-16
Audio System(s).............................................3-39
AM-FM Radio.............................................3-40
Audio Steering Wheel Controls......................3-50
Care of Your Cassette Tape Player................3-51
Care of Your CD Player...............................3-52
Care of Your CDs........................................3-52
Fixed Mast Antenna.....................................3-52
Radio with Cassette and CD.........................3-42
Setting the Time..........................................3-39
Theft-Deterrent Feature................................3-48
Understanding Radio Reception.....................3-50
Automatic Transaxle Check..............................6-11
Automatic Transaxle Shift Lock Control System
Check........................................................6-12
Automatic Transaxle........................................5-19
Fluid..........................................................5-19
Operation...................................................2-23
Auxiliary Power Connection (Power Drop)...........3-16
1

Child Restraints (cont.)
Infants and Young Children...........................1-32
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-42
Older Children.............................................1-30
Securing a Child Restraint Designed for the
LATCH System........................................1-45
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-48
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-45
Securing a Child Restraint in the Right Front
Seat Position...........................................1-50
Top Strap Anchor Location............................1-42
Top Strap...................................................1-40
Where to Put the Restraint...........................1-39
Cigarette Lighter.............................................3-16
Cleaning Aluminum Wheels..............................5-84
Cleaning Exterior Lamps/Lenses.......................5-83
Cleaning Fabric/Carpet....................................5-79
Cleaning Glass Surfaces..................................5-81
Cleaning Interior Plastic Components.................5-81
Cleaning Leather............................................5-81
Cleaning the Top of the Instrument Panel...........5-81
Cleaning Tires................................................5-84
Cleaning Vinyl................................................5-81Cleaning Windshield and Wiper Blades..............5-83
Cleaning........................................................5-79
Inside of Your Vehicle..................................5-79
Outside of Your Vehicle................................5-82
Underbody Maintenance...............................5-85
Weatherstrips..............................................5-82
Climate Control System...................................3-20
Air Filter, Passenger Compartment.................3-20
Dual..........................................................3-17
Outlet Adjustment........................................3-20
Compact Disc Messages..................................3-47
Compact Spare Tire........................................5-78
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-35
Coolant.........................................................3-30
Engine Temperature Gage............................3-30
Engine Temperature Warning Light.................3-29
Heater, Engine............................................2-21
Cooling System..............................................5-29
Courtesy Lamps.............................................3-14
Cruise Control Light........................................3-36
Cruise Control.................................................. 3-8
Current and Past Model Order Forms................7-12
Customer Assistance Information........................ 7-8
Courtesy Transportation.................................. 7-8
3

E
Electrical System............................................5-88
Add-On Equipment......................................5-88
Fuses and Circuit Breakers...........................5-89
Headlamp Wiring.........................................5-88
Power Windows and Other Power Options......5-88
Windshield Wiper Fuses...............................5-88
Emergency Trunk Release Handle.....................2-14
Emissions Inspection and Maintenance
Programs...................................................3-33
Engine Coolant Level Check.............................6-10
Engine Cooling When Trailer Towing..................4-41
Engine Oil Additives........................................5-16
Engine Oil Level Check...................................6-10
Engine Oil Scheduled Maintenance..................... 6-5
Engine..........................................................5-18
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-42
Change Engine Oil Light...............................3-35
Check and Service Engine Soon Light............3-31
Compartment Overview................................5-12
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-30
Coolant Temperature Warning Light................3-29
Coolant......................................................5-23
Cooling System Inspection............................6-14Engine (cont.)
Exhaust.....................................................2-30
Oil .............................................................5-13
Overheating................................................5-26
Starting......................................................2-20
Enhanced Traction System (ETS)......................4-10
Warning Light.............................................3-28
Entry Lighting.................................................3-14
Express-Down Window....................................2-16
Extender, Safety Belt.......................................1-29
Exterior Lamps...............................................3-11
F
Filter.............................................................5-18
Engine Air Cleaner......................................5-18
Finding a Station....................................3-40, 3-42
Finish Care....................................................5-83
Finish Damage...............................................5-84
Fixed Mast Antenna........................................3-52
Flash-to-Pass................................................... 3-7
Flat Tire, Changing.........................................5-67
Flat Tire........................................................5-66
Fluid.............................................................5-19
Automatic Transaxle.....................................5-19
Power Steering...........................................5-36
Windshield Washer......................................5-38
5

Other Warning Devices...................................... 3-4
Outlet Adjustment............................................3-20
Outside.........................................................2-33
Convex Mirror.............................................2-33
Power Mirrors.............................................2-33
Overheated Engine Protection Operating Mode . . . 5-26
Overseas ± Customer Assistance........................ 7-5
Owners, Canadian............................................... ii
Owner's Information........................................7-12
P
Park (P)........................................................2-29
Shifting Out of............................................2-29
Parking Brake and Automatic Transaxle Park (P)
Mechanism Check.......................................6-13
Parking on Hills..............................................4-40
Parking.........................................................2-26
Brake........................................................2-26
Over Things That Burn.................................2-29
Park(P).........................................................2-26
Shifting Into................................................2-26Part A - Scheduled Maintenance Services............ 6-4
Part B - Owner Checks and Services................6-10
Part C - Periodic MaintenanceInspections..........6-14
Part D - Recommended Fluids and Lubricants....6-16
Part E - Maintenance Record...........................6-17
Passenger Compartment Air Filter.....................3-20
Passing.................................................4-14, 4-39
PASS-Key
žII .................................................2-17
Plan Ahead When Possible................................ 7-8
Playing a Cassette Tape..................................3-44
Playing a Compact Disc...................................3-46
Playing the Radio...................................3-40, 3-42
Power Steering...............................................4-11
Power...........................................................3-16
Auxiliary Connection.....................................3-16
Door Locks.................................................2-11
Drop..........................................................3-16
Electrical System.........................................5-88
Six-Way Seats.............................................. 1-3
Steering Fluid.............................................5-36
Windows....................................................2-16
Programmable Automatic Door Locks.................2-11
10