2004 BUICK CENTURY engine oil

(h)Change automatic transaxle uid and lter 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.
(i)Drain, ush and rell cooling system. See Engine
Coolant on page 5-22for what to use. Inspect hoses.
Clean radiator, condenser, pressure cap and ller neck.
Pressure test the cooling system and pressure cap.
(j)Check throttle system for interference or binding and
for damaged or missing parts. Replace parts as
needed. Replace any components that have high effort
or excessive wear. Do not lubricate accelerator or
cruise control cables.
(k)A uid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired
and the uid level checked. Add uid if needed.Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure the safety,
dependability and emission control performance of your
vehicle. Your GM Goodwrench dealer can assist you
with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-12.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-13for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
6-8

Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name, part
number or specication may be obtained from your
dealer.
Usage Fluid/Lubricant
Engine OilEngine oil which meets GM
Standard GM6094M and displays
the American Petroleum Institute
Certied for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, seeEngine Oil on
page 5-13.
Engine Coolant50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 5-22.
Hydraulic Brake
SystemDelco Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
Washer SolventGM Optikleen
®Washer Solvent.
Usage Fluid/Lubricant
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Automatic
TransaxleDEXRON
®-III Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474).
Hood Latch
Assembly,
Secondary
Latch,
Pivots, Spring
Anchor and
Release PawlLubriplate Lubricant Aerosol
(GM Part No. U.S. 12346293, in
Canada 992723) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Hood and
Door HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 109435474).
Weatherstrip
ConditioningDielectric Silicone Grease
(GM Part No. U.S. 12345579, in
Canada 992887).
6-12

Normal Maintenance Replacement Parts
Replacement parts identied below by name, part number, or specication can be obtained from your dealer.
Normal Maintenance Replacement Parts
Part GM Part Number ACDelco®Part Number
Engine Air Cleaner/Filter 24508572 A1614C
Engine Oil Filter 25010792 PF-47
Passenger Compartment Air Filter 10406026 —
Spark Plugs
Gap12568387
.060 inches (56.0 cm)41–101
.060 inches (56.0 cm)
Windshield Wiper Blades 22143943 —
Type Shepherd’s Hook Style
Length 22.0 inches (56.0 cm)
6-13

B
Backing Up....................................................4-43
Battery..........................................................5-41
Battery Replacement......................................... 2-9
Battery Rundown Protection.............................3-16
Before Leaving on a Long Trip.........................4-22
Brake
Parking......................................................2-25
System Warning Light..................................3-32
Brake Fluid....................................................5-38
Brake Wear...................................................5-40
Brakes..........................................................5-38
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-18
Bulb Replacement...........................................5-51
Back-Up Lamps...........................................5-55
Center High-Mounted Stoplamp (CHMSL)........5-53
Front Turn Signal and Parking Lamps.............5-52
Halogen Bulbs............................................5-51
Headlamp Aiming........................................5-49
Headlamps.................................................5-51
Replacement Bulbs......................................5-55
Taillamps, Turn Signal, and Stoplamps............5-54
Buying New Tires...........................................5-69
C
California Fuel.................................................. 5-5
Canada – Customer Assistance.......................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-6
Capacities and Specications..........................5-103
Carbon Monoxide...................4-26, 4-39, 2-13, 2-29
Care of
Safety Belts................................................5-91
Your Cassette Tape Player............................3-63
Your CD Player...........................................3-64
Your CDs ...................................................3-64
Cassette Tape Messages.................................3-59
Cassette Tape Player Service............................. 6-9
CD Adapter Kits.............................................3-59
CD Messages........................................3-52, 3-61
Center Console Storage Area...........................2-35
Center High-Mounted Stoplamp (CHMSL)...........5-53
Center Passenger Position, Safety Belts.............1-20
Chains, Tires..................................................5-73
Charging System Light....................................3-31
Check
Engine Light...............................................3-36
Checking Coolant............................................5-23
Checking Engine Oil........................................5-13
2

E
Electrical System
Add-On Equipment......................................5-97
Fuses and Circuit Breakers...........................5-97
Headlamp Wiring.........................................5-97
Power Windows and Other Power Options......5-97
Windshield Wiper Fuses...............................5-97
Emergency Trunk Release Handle.....................2-14
Emissions Inspection and Maintenance
Programs...................................................3-39
Engine
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-41
Change Engine Oil Light...............................3-41
Check and Service Engine Soon Light............3-36
Coolant......................................................5-22
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-35
Coolant Temperature Warning Light................3-35
Drive Belt Routing.......................................6-14
Engine Compartment Overview......................5-12
Exhaust.....................................................2-29
Oil .............................................................5-13
Overheating................................................5-25
Starting......................................................2-20
Engine Cooling When Trailer Towing..................4-45
Engine Oil Additives........................................5-16Enhanced Traction System (ETS)........................ 4-9
Warning Light.............................................3-34
Entry Lighting.................................................3-15
Event Data Records (EDR)................................ 7-9
Express-Down Window....................................2-16
Extender, Safety Belt.......................................1-27
Exterior Lamps...............................................3-12
F
Filter
Engine Air Cleaner......................................5-18
Finding a Program Type (PTY) Station.......3-49, 3-56
Finding a Station....................................3-46, 3-53
Finish Care....................................................5-92
Finish Damage...............................................5-93
Fixed Mast Antenna........................................3-64
Flash-to-Pass................................................... 3-6
Flat Tire........................................................5-74
Flat Tire, Changing.........................................5-75
Fluid
Automatic Transaxle.....................................5-19
Power Steering...........................................5-35
Windshield Washer......................................5-36
FM ...............................................................3-63
Folding Rear Seat............................................ 1-5
Following Distance..........................................4-43
5

I
If No Steam Is Coming From Your Engine..........5-27
If Steam Is Coming From Your Engine...............5-26
If the Light Is Flashing.....................................3-37
If the Light Is On Steady.................................3-38
If You Are Caught in a Blizzard.........................4-28
If You Are Stuck in Sand, Mud, Ice or Snow.......4-30
If You Do Decide To Pull A Trailer.....................4-40
Ignition Positions.............................................2-19
Illumination on Remote Activation........................ 2-8
Infants and Young Children, Restraints...............1-30
Ination - Tire Pressure...................................5-64
Instrument Panel
Cluster.......................................................3-28
Overview..................................................... 3-2
Instrument Panel Brightness.............................3-15
Instrument Panel Fuse Block............................5-98
Interior Lamps................................................3-15
J
Jump Starting.................................................5-42
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-2
L
Lamps
Exterior......................................................3-12
Interior.......................................................3-15
Lap Belt........................................................1-20
Lap-Shoulder Belt...................................1-12, 1-22
LATCH System
Child Restraints...........................................1-40
Securing a Child Restraint Designed for the
LATCH System........................................1-42
Leaving Your Vehicle.......................................2-12
Leaving Your Vehicle With the Engine
Running.....................................................2-27
Light
Air Bag Readiness.......................................3-30
Anti-Lock Brake System Warning...................3-33
Brake System Warning.................................3-32
Change Engine Oil......................................3-41
Charging System.........................................3-31
Cruise Control.............................................3-42
Door/Trunk Ajar Warning...............................3-42
Engine Coolant Temperature Warning.............3-35
Enhanced Traction System (ETS)
Warning Light..........................................3-34
Low Fuel Warning.......................................3-44
Low Traction...............................................3-34
Low Washer Fluid Warning...........................3-42
7

Mirrors
Manual Rearview Mirror................................2-31
Manual Rearview Mirror with OnStar
®.............2-31
Outside Convex Mirror.................................2-32
Outside Power Mirrors..................................2-32
MyGMLink.com................................................ 7-3
N
New Vehicle Break-In......................................2-18
Normal Maintenance Replacement Parts............6-13
O
Odometer......................................................3-29
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-41
Engine.......................................................5-13
Pressure Light.............................................3-40
Older Children, Restraints................................1-28
Online Owner Center........................................ 7-3
OnStar
®Personal Calling.................................2-34
OnStar®Services............................................2-33
OnStar®System.............................................2-33
OnStar®Virtual Advisor....................................2-34
Operation Tips................................................3-26
Other Warning Devices...................................... 3-4Outlet Adjustment............................................3-25
Outside
Convex Mirror.............................................2-32
Power Mirrors.............................................2-32
Overheated Engine Protection
Operating Mode..........................................5-25
Overseas – Customer Assistance........................ 7-4
Owner Checks and Services.............................. 6-8
Owners, Canadian............................................... ii
Owner’s Information........................................7-12
P
Park (P)
Shifting Into................................................2-26
Shifting Out of............................................2-28
Parking
Brake........................................................2-25
Over Things That Burn.................................2-29
Parking on Hills..............................................4-44
Passenger Compartment Air Filter.....................3-26
Passenger Control..........................................3-24
Passing.................................................4-13, 4-43
PASS-Key
®II .................................................2-17
Plan Ahead When Possible................................ 7-7
Playing a Cassette Tape..................................3-58
Playing a CD.........................................3-51, 3-60
Playing the Radio...................................3-45, 3-53
9

W
Warning Lights, Gages and Indicators................3-27
Warnings
Hazard Warning Flashers............................... 3-4
Other Warning Devices.................................. 3-4
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washer Fluid, Low Warning Light......................3-42
Washing Your Vehicle......................................5-91
Weight of the Trailer........................................4-40
Weight of the Trailer Tongue.............................4-41
What Kind of Engine Oil to Use........................5-14
What to Do with Used Oil................................5-17
What to Use..........................................5-22, 5-36
Wheels
Alignment and Tire Balance..........................5-71
Replacement...............................................5-72
When to Add Engine Oil..................................5-14
When to Change Engine Oil
(GM Oil Life System)...................................5-16When to Check..............................................5-65
When to Check and Change............................5-19
When to Check Power Steering Fluid................5-36
When You Are Ready to Leave After Parking
on a Hill.....................................................4-45
Where to Put the Restraint...............................1-37
Why Safety Belts Work..................................... 1-7
Window Lock-Out............................................2-16
Windows.......................................................2-15
Power........................................................2-16
Windshield Washer........................................... 3-8
Fluid..........................................................5-36
Windshield Wiper
Blade Replacement......................................5-56
Fuses........................................................5-97
Windshield Wipers............................................ 3-7
Winter Driving................................................4-26
Y
Your Vehicle and the Environment....................... 6-2
14