2004 BUICK CENTURY cooling

Additional Required Services
The following services should be performed at the rst maintenance service (IorII) after the indicated miles
(kilometers) shown for each item.
Service25,000
(41 500)50,000
(83 000)75,000
(125 000)100,000
(166 000)125,000
(207 500)150,000
(240 000)
Inspect fuel system for damage or leaks.••••••
Inspect exhaust system for loose or
damaged components.••••••
Replace engine air cleaner lter. See
Engine Air Cleaner/Filter on page 5-18.
An Emission Control Service.••••••
Change automatic transaxle uid and
lter (severe service).See footnote (h).•••
Change automatic transaxle uid and
lter (normal service).•
Replace spark plugs and inspect spark
plug wires.An Emission Control Service.•
Engine cooling system service
(or every 5 years, whichever occurs
rst).An Emission Control Service.
See footnote (i).•
Inspect engine accessory drive belt.
An Emission Control Service.•
6-6

Maintenance 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.
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chang, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose or missing parts or
signs of wear. Inspect power steering lines and
hoses for proper hook-up, binding, leaks, cracks,
chang, etc.
(c)Visually inspect hoses and have them replaced if
they are cracked, swollen or deteriorated. Inspect
all pipes, ttings and clamps; replace with genuine
GM parts as needed. To help ensure proper operation,
a pressure test of the cooling system and pressure
cap and cleaning the outside of the radiator and
air conditioning condenser is recommended at least
once a year.(d)Visually inspect wiper blades for wear or cracking.
Replace blade inserts that appear worn or damaged
or that streak or miss areas of the windshield.
(e)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced. Also look for any opened or broken air bag
coverings, and have them repaired or replaced. (The air
bag system does not need regular maintenance.)
(f)Lubricate all key lock cylinders. Lubricate all hinges
and latches, including those for the body doors,
hood, secondary latch, pivots, spring anchor, release
pawl, rear compartment, glove box door and console
door. More frequent lubrication may be required
when exposed to a corrosive environment. Applying
silicone grease on weatherstrips with a clean cloth will
make them last longer, seal better and not stick or
squeak.
(g)If you drive regularly under dusty conditions, the
lter may require replacement more often.
6-7

(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

Checking Things Under the Hood......................5-10
Checking Your Restraint Systems......................1-58
Chemical Paint Spotting...................................5-94
Child Restraints
Child Restraint Systems...............................1-34
Infants and Young Children...........................1-30
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-40
Older Children.............................................1-28
Securing a Child Restraint Designed for the
LATCH System........................................1-42
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-44
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-42
Securing a Child Restraint in the Right Front
Seat Position...........................................1-47
Top Strap...................................................1-38
Top Strap Anchor Location............................1-39
Where to Put the Restraint...........................1-37
Cigarette Lighter.............................................3-17
Cleaning
Inside of Your Vehicle..................................5-88
Outside of Your Vehicle................................5-91
Underbody Maintenance...............................5-94
Weatherstrips..............................................5-91
Cleaning Aluminum Wheels..............................5-93Cleaning Exterior Lamps/Lenses.......................5-92
Cleaning Fabric/Carpet....................................5-88
Cleaning Glass Surfaces..................................5-90
Cleaning Interior Plastic Components.................5-90
Cleaning Leather............................................5-90
Cleaning the Top of the Instrument Panel...........5-90
Cleaning Tires................................................5-93
Cleaning Vinyl................................................5-90
Cleaning Windshield and Wiper Blades..............5-92
Climate Control System
Air Filter, Passenger Compartment.................3-26
Dual..........................................................3-18
Dual Automatic............................................3-21
Outlet Adjustment........................................3-25
Compact Spare Tire........................................5-87
Control of a Vehicle.......................................... 4-5
Convenience Net............................................2-35
Coolant
Engine Temperature Gage............................3-35
Engine Temperature Warning Light.................3-35
Heater, Engine............................................2-21
Cooling System..............................................5-28
Courtesy Lamps.............................................3-15
Cruise Control.................................................. 3-8
Cruise Control Light........................................3-42
Current and Past Model Order Forms................7-12
3

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