key BUICK CENTURY 2005 Service Manual

Underhood Fuse Block
Some fuses and relays are located in the underhood
fuse block on the passenger’s side of the vehicle in the
engine compartment. SeeEngine Compartment
Overview on page 5-12for more information on location.
Fuses Usage
1 Anti-Lock Brake System
2 Starter Solenoid
3 Power Seat, Rear Window Defogger
4High Blower, Hazard Flasher,
Stoplamps, Power Mirror,
Door Locks
Fuses Usage
5Ignition Switch, Stoplamps,
Anti-Lock Brake System, Turn
Signals, Cluster, Air Bag, Daytime
Running Lamps Module
6 Cooling Fan
7Retained Accessory Power,
Remote Keyless Entry, Data Link,
Heating, Ventilation, and Air
Conditioning Head; Cluster, Radio,
Cigarette Lighter
8Ignition Switch, Wipers, Audio
Steering Wheel Controls, Body
Control Module, Power Windows,
Sunroof, Heating, Ventilation, and
Air Conditioning Controls; Daytime
Running Lamps, Rear Window
Defogger Relay
Relays Usage
9 Cooling Fan 2
10 Cooling Fan 3
11 Starter Solenoid
12 Cooling Fan 1
13 Ignition Main
14 Air Pump (Optional)
5-94

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.
6-8

Automatic Transaxle Shift Lock Control
System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake. SeeParking Brake
on page 2-24if necessary.
Be ready to apply the regular brake immediately if
the vehicle begins to move.3. With the engine off, turn the key to the RUN
position, but do not start the engine. Without
applying the regular brake, try to move the shift
lever out of PARK (P) with normal effort. If the
shift lever moves out of PARK (P), contact your
GM Goodwrench dealer for service.Ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
The key should turn to LOCK only when the
shift lever is in PARK (P).
The key should come out only in LOCK.
Contact your GM Goodwrench dealer if service
is required.
6-11

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. GM Goodwrench
oil meets all the requirements for
your vehicle. 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. Look for
Approved for the H-Specication
on the label.
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).
6-13

GM Mobility Program for Persons
with Disabilities
This program, available to
qualied applicants, can
reimburse you up to
$1,000 toward eligible
aftermarket driver or
passenger adaptive
equipment that may be
required for your vehicle,
such as hand controls,
wheelchair/scooter
lifts, etc.
This program can also provide you with free resource
information, such as area driver assessment centers and
mobility equipment installers. The offer is available for
a limited period of time from the date of vehicle
purchase/lease. For more details, or to determine your
vehicle’s eligibility, see your GM dealer or call the
GM Mobility Assistance Center at 1-800-323-9935.
Text telephone (TTY) users, call 1-800-833-9935.
GM of Canada also has a Mobility Program.
Call 1-800-GM-DRIVE (463-7483) for details.
All TTY users call 1-800-263-3830.
Roadside Assistance Program
Call 1-800-252-1112 for Buick Roadside Assistance.
As the proud owner of a new Buick vehicle, you
are automatically enrolled in the Buick Roadside
Assistance program. This value-added service is
intended to provide you with peace of mind as you drive
in the city or travel the open road. Buick’s Roadside
Assistance toll-free number is staffed by courteous and
capable Roadside Assistance Representatives who
are available 24 hours a day, 365 days a year.
We will provide the following services during the
Bumper-to-Bumper warranty period, at no expense
to you:
Fuel Delivery:Delivery of enough fuel,
$5 maximum, for the customer to get to the
nearest service station.
Lock-out Service (identication required):
Replacement keys or locksmith service will
be covered at no charge if you are unable to gain
entry into your vehicle. Delivery of the replacement
key will be covered within 10 miles.
Emergency Tow:Tow to the nearest dealership for
warranty service or in the event of a vehicle-disabling
accident. Assistance when the vehicle is mired in
sand, mud, or snow.
7-6

Headlamp Wiring............................................5-91
Headlamps....................................................5-47
Bulb Replacement.......................................5-47
Daytime Running Lamps/Automatic
Headlamp System....................................3-14
Delayed.....................................................3-13
Flash-to-Pass............................................... 3-8
Front Turn Signal and Parking Lamps.............5-48
Halogen Bulbs............................................5-47
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-13
Heater...........................................................3-18
Heater...........................................................3-21
Highway Hypnosis...........................................4-23
Hill and Mountain Roads..................................4-24
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-6
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-12
I
If You Are Stuck in Sand, Mud, Ice or Snow.......4-30
Ignition Positions.............................................2-18
Infants and Young Children, Restraints...............1-30
Ination -- Tire Pressure..................................5-60Instrument Panel
Brightness..................................................3-15
Cluster.......................................................3-29
Overview..................................................... 3-4
Interior Lamps................................................3-15
J
Jump Starting.................................................5-40
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-2
L
Labelling, Tire Sidewall....................................5-54
Lamps
Battery Run-Down Protection.........................3-17
Cornering...................................................3-15
Courtesy....................................................3-15
Dome........................................................3-16
Exterior......................................................3-13
Interior.......................................................3-15
Reading.....................................................3-17
6

Malfunction Indicator Light................................3-36
Manual Seats................................................... 1-2
Mirrors
Manual Rearview Mirror................................2-29
Manual Rearview Mirror with OnStar
®.............2-29
Outside Convex Mirror.................................2-30
Outside Power Mirrors..................................2-30
MyGMLink.com................................................ 7-4
N
New Vehicle Break-In......................................2-17
Normal Maintenance Replacement Parts............6-14
O
Odometer......................................................3-30
Odometer, Trip...............................................3-30
Off-Road Recovery..........................................4-13
Oil
Change Engine Oil Light...............................3-40
Engine.......................................................5-13
Pressure Light.............................................3-40
Older Children, Restraints................................1-27
Online Owner Center........................................ 7-4
OnStar
®System.............................................2-31
Other Warning Devices...................................... 3-6Outlet Adjustment............................................3-26
Outside
Convex Mirror.............................................2-30
Power Mirrors.............................................2-30
Overheated Engine Protection
Operating Mode..........................................5-26
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
P
Park (P)
Shifting Into................................................2-25
Shifting Out of............................................2-26
Parking
Brake........................................................2-24
Over Things That Burn.................................2-27
Passenger Compartment Air Filter.....................3-26
Passing.........................................................4-13
PASS-Key
®II .................................................2-16
Power
Door Locks.................................................2-11
Electrical System.........................................5-91
Retained Accessory (RAP)............................2-19
Seat............................................................ 1-3
Steering Fluid.............................................5-34
Windows....................................................2-15
Programmable Automatic Door Locks.................2-11
8

Q
Questions and Answers About Safety Belts.........1-11
R
Radiator Pressure Cap....................................5-24
Radios..........................................................3-44
Care of Your Cassette Tape Player................3-65
Care of Your CD Player...............................3-66
Care of Your CDs........................................3-66
Radio with Cassette and CD.........................3-53
Radio with CD............................................3-45
Setting the Time..........................................3-44
Theft-Deterrent............................................3-63
Understanding Reception..............................3-64
Reading Lamps..............................................3-17
Rear Safety Belt Comfort Guides......................1-24
Rear Seat Passengers, Safety Belts..................1-21
Rearview Mirror with OnStar
®...........................2-29
Rearview Mirrors.............................................2-29
Reclining Seatbacks.......................................... 1-4
Recommended Fluids and Lubricants.................6-13
Recreational Vehicle Towing.............................4-36
Remote Keyless Entry System............................ 2-4
Remote Keyless Entry System, Operation............ 2-5
Removing the Flat Tire and Installing the
Spare Tire..................................................5-73
Removing the Spare Tire and Tools...................5-71Replacement Bulbs.........................................5-51
Reporting Safety Defects
Canadian Government..................................7-11
General Motors...........................................7-11
United States Government............................7-10
Restraint System Check
Checking Your Restraint Systems...................1-58
Replacing Restraint System Parts
After a Crash..........................................1-59
Restraint Systems
Checking....................................................1-58
Replacing Parts...........................................1-59
Retained Accessory Power (RAP)......................2-19
Right Front Passenger Position, Safety Belts.........1-19
Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle to Get it Out....................4-31
Routing, Engine Drive Belt...............................6-15
Running Your Engine While You Are Parked..........2-28
S
Safety Belt
Reminder Light............................................3-30
Safety Belts
Care of......................................................5-85
Center Passenger Position............................1-20
Driver Position............................................1-12
How to Wear Safety Belts Properly................1-12
9

T
Taillamps
Turn Signal, and Stoplamps..........................5-50
Theft-Deterrent, Radio.....................................3-63
Theft-Deterrent Systems...................................2-16
PASS-Key
®II ..............................................2-16
Tilt Wheel........................................................ 3-6
Tire
Pressure Light.............................................3-36
Tires.............................................................5-53
Aluminum Wheels, Cleaning..........................5-87
Buying New Tires........................................5-64
Chains.......................................................5-68
Changing a Flat Tire....................................5-70
Cleaning....................................................5-87
Compact Spare Tire.....................................5-81
If a Tire Goes Flat.......................................5-69
Ination -- Tire Pressure...............................5-60
Inspection and Rotation................................5-63
Installing the Spare Tire................................5-73
Pressure Monitor System..............................5-61
Removing the Flat Tire.................................5-73
Removing the Spare Tire and Tools...............5-71
Storing a Flat or Spare Tire and Tools............5-79
Tire Sidewall Labelling..................................5-54
Tire Terminology and Denitions....................5-57
Uniform Tire Quality Grading.........................5-65Tires (cont.)
Wheel Alignment and Tire Balance.................5-67
Wheel Replacement.....................................5-67
When It Is Time for New Tires......................5-64
Top Strap......................................................1-37
Top Strap Anchor Location...............................1-39
Towing
Recreational Vehicle.....................................4-36
Towing a Trailer..........................................4-38
Your Vehicle...............................................4-36
Traction
Enhanced Traction System (ETS).................... 4-9
Enhanced Traction System (ETS)
Warning Light..........................................3-34
Low Light...................................................3-34
Transaxle
Fluid, Automatic...........................................5-19
Transaxle Operation, Automatic.........................2-21
Trip Odometer................................................3-30
Trunk............................................................2-12
Turn and Lane-Change Signals.......................... 3-7
Turn Signal/Multifunction Lever........................... 3-7
U
Understanding Radio Reception........................3-64
Uniform Tire Quality Grading............................5-65
11