2005 BUICK CENTURY key

For additional information, see “When to Change
Engine Oil (GM Oil Life System)” and “How to Reset
the CHANGE OIL SOON Light ” underEngine Oil
on page 5-13.
Security Light
The SECURITY light will
come on when the key is
turned to START, and
will stay on until the
vehicle starts.
It will also ash if the ignition key is too dirty or wet for
the PASS-Key
®II system to read the resistor pellet.
SeePASS-Key®II on page 2-16.
If the resistor pellet is damaged or missing, the light
will come on.
Cruise Control Light
The CRUISE light comes
on whenever the cruise
control is set. See “Cruise
Control” underTurn
Signal/Multifunction Lever
on page 3-7.
Low Washer Fluid Warning Light
If the LOW WASH light
comes on when the
windshield washer paddle
is used, this indicates
that the uid is low
in the windshield
washer reservoir.
The light will also come on briey when the ignition is
turned on to show that it is working properly.
3-41

Theft-Deterrent Feature
THEFTLOCK®is designed to discourage theft of your
vehicle’s radio. It works by using a secret code to
disable all radio functions whenever battery power is
removed and the radio is placed in a different vehicle.
This feature requires no user input to be activated.
The radio is automatically armed when it is put into the
vehicle for the rst time.
When the ignition is turned off, the blinking red light
indicates that THEFTLOCK
®is armed.
If THEFTLOCK
®is activated, the radio will not operate
if stolen. The radio will display LOCKED and a red
LED indicator light will come on above the key symbol
to indicate a locked condition. If this occurs, the radio will
need to be returned to your GM dealer.
Audio Steering Wheel Controls
If your vehicle has this feature, some audio functions
can be adjusted at the steering wheel. They include
the following:
QSEEKR:Press the up or the down arrow to go to
the next or to the previous radio station. The radio
will only seek stations with a strong signal that are in
the selected band.
When a cassette tape or CD is playing, press the
up or the down arrow to go to the next or the
previous selection.
3-63

According to the American Medical Association, a 180 lb
(82 kg) person who drinks three 12 ounce (355 ml)
bottles of beer in an hour will end up with a BAC
of about 0.06 percent. The person would reach the
same BAC by drinking three 4 ounce (120 ml) glasses
of wine or three mixed drinks if each had 1-1/2 ounces
(45 ml) of liquors like whiskey, gin, or vodka.It is the amount of alcohol that counts. For example, if
the same person drank three double martinis (3 ounces
or 90 ml of liquor each) within an hour, the person’s
BAC would be close to 0.12 percent. A person
who consumes food just before or during drinking will
have a somewhat lower BAC level.
There is a gender difference, too. Women generally
have a lower relative percentage of body water
than men. Since alcohol is carried in body water, this
means that a woman generally will reach a higher BAC
level than a man of her same body weight will when
each has the same number of drinks.
The law in most U.S. states, and throughout Canada,
sets the legal limit at 0.08 percent. In some other
countries, the limit is even lower. For example, it is
0.05 percent in both France and Germany. The BAC
limit for all commercial drivers in the United States
is 0.04 percent.
The BAC will be over 0.10 percent after three to
six drinks (in one hour). Of course, as we have seen,
it depends on how much alcohol is in the drinks,
and how quickly the person drinks them.
4-4

Here are some important things to consider before you
do recreational vehicle towing:
What is the towing capacity of the towing vehicle?
Be sure you read the tow vehicle manufacturer’s
recommendations.
How far will you tow? Some vehicles have
restrictions on how far and how long they can tow.
Do you have the proper towing equipment?
See your dealer or trailering professional for
additional advice and equipment recommendations.
Is your vehicle ready to be towed? Just as you
would prepare your vehicle for a long trip, you
will want to make sure your vehicle is prepared to
be towed. SeeBefore Leaving on a Long Trip
on page 4-22.
Dinghy Towing
Notice:If you tow your vehicle with all four wheels
on the ground, the drivetrain components could
be damaged. The repairs would not be covered by
your warranty. Do not tow your vehicle with all
four wheels on the ground.
Your vehicle was not designed to be towed with all four
wheels on the ground. If your vehicle must be towed,
you should use a dolly. See “Dolly Towing” that follows
for more information.
Dolly Towing
Your vehicle can be towed using a dolly. To tow your
vehicle using a dolly, follow these steps:
1. Put the front wheels on a dolly.
2. Put the gear shift lever in PARK (P).
3. Set the parking brake and then remove the
ignition key.
4. Clamp the steering wheel in a
straight-ahead position.
5. Release the parking brake.
4-37

How to Reset the CHANGE OIL
SOON Light
The GM Oil Life System calculates when to change
your engine oil and lter based on vehicle use.
Anytime your oil is changed, reset the system so it can
calculate when the next oil change is required. If a
situation occurs where you change your oil prior to a
CHANGE OIL SOON light being turned on, reset
the system.
After changing the engine oil, reset the system by
performing the following steps:
1. Turn the ignition key to RUN with the engine off.
2. Fully press and release the accelerator pedal slowly
three times within ve seconds.
If the CHANGE OIL SOON light ashes, the system
is resetting.
3. Turn the key to OFF, then start the vehicle. The oil
life will change to 100 percent.
If the CHANGE OIL SOON light comes back on
when you start your vehicle, the engine oil life
system has not reset. Repeat the procedure.
What to Do with Used Oil
Used engine oil contains certain elements that may be
unhealthy for your skin and could even cause cancer.
Do not let used oil stay on your skin for very long. Clean
your skin and nails with soap and water, or a good
hand cleaner. Wash or properly dispose of clothing or
rags containing used engine oil. See the manufacturer’s
warnings about the use and disposal of oil products.
Used oil can be a threat to the environment. If you
change your own oil, be sure to drain all the oil from the
lter before disposal. Never dispose of oil by putting it
in the trash, pouring it on the ground, into sewers, or into
streams or bodies of water. Instead, recycle it by
taking it to a place that collects used oil. If you have a
problem properly disposing of your used oil, ask
your dealer, a service station or a local recycling
center for help.
5-17

Power Steering Fluid
The power steering uid
reservoir is located at the
back of the engine
compartment, on the
passenger’s side of
the vehicle.
SeeEngine Compartment Overview on page 5-12
for reservoir location.
When to Check Power Steering Fluid
It is not necessary to regularly check power steering uid
unless there appears to be a leak in the system or an
unusual noise is heard. A uid loss in this system
could indicate a problem. Have the system inspected
and repaired.
How to Check Power Steering Fluid
To check the power steering uid, do the following:
1. Turn the key off and let the engine compartment
cool down.
2. Wipe the cap and the top of the reservoir clean.3. Unscrew the cap and wipe the dipstick with a
clean rag.
4. Replace the cap and completely tighten it.
5. Remove the cap again and look at the uid level
on the dipstick.
When the engine
compartment is hot, the
level should be at the
H (hot) mark. When it is
cold, the level should be at
the C (cold) mark. If the
uid is at the ADD mark,
uid should be added.
What to Use
To determine what kind of uid to use, see
Recommended Fluids and Lubricants on page 6-13.
Always use the proper uid. Failure to use the proper
uid can cause leaks and damage hoses and seals.
5-34

Circuit
BreakersUsage
TIRE RESET Tire Ination Monitor Reset Button
PWR/WNDW
PWR S/ROOFPower Windows, Power Sunroof
R/DEFOG Rear Window Defogger
PWR/ SEAT Power Seat
Blank Not Used
Fuses Usage
PRK/LCK Ignition Key Solenoid
Blank Not Used
Blank Not Used
PCM, BCM,
U/HIgnition Signal: Hot in Run and Start,
Powertrain Control Module, Body
Control Module, Underhood Relay
RADIO PREM.
SOUNDNot Used
PWR MIR Power Mirrors
Blank Not Used
INT/ILLUM Panel Dimming
Blank Not Used
IGN 0: CLSTR,
PCM & BCMIgnition Signal: Hot in Run,
Unlock and Start; Cluster,
Powertrain Control Module,
Body Control Module
Blank Not Used
Blank Not Used
Blank Not Used
ACCY PWR
BUSInterior Lamps
DR/ LCK Door Locks
5-92

Fuses Usage
Blank Not Used
R/LAMPS Taillamps, License Plate Lamps
Blank Not Used
Blank Not Used
CRUISE Cruise Control
Blank Not Used
CLSTR Instrument Panel Cluster
LTR Cigarette Lighter
STOP LAMPS Stoplamps
ONSTAR OnStar
®
PRK/LGHT Parking Lamps
Blank Not Used
CRNK SIG,
BCM, CLSTRCrank Signal, Body Control Module,
Cluster, Powertrain Control Module
HVACIgnition Signal, Heating, Ventilation,
and Air Conditioning Control Head
BTSI (REGAL) Not Used
AIR BAG Air Bag
Fuses Usage
BCM PWR Body Control Module
HAZARD Hazard Warning Flashers
LH HTD SEAT Not Used
Blank Not Used
BCM ACCYIgnition Signal: Hot in ACCESSORY
and RUN, Body Control Module
Blank Not Used
LOW BLWR Low Blower
ABS Anti-Lock Brakes
TRN SIG Turn Signals, Cornering Lamps
RADIO, HVAC,
RFA, CLSTR
ALDLRadio, Heating Ventilation and
Air Conditioning Head; Remote
Keyless Entry, Cluster
HI BLWR High Blower
RH HTD SEAT Not Used
STR/WHL/
CNTRLAudio Steering Wheel Controls
WPR Windshield Wipers
5-93