2002 BUICK LESABRE engine coolant

2-
2-1
Section 2 Features and Controls
Here you can learn about the many standard and optional features on your vehicle, and information on starting,
shifting and braking. Also explained are the instrument panel and the warning systems that tell you if everything is
working properly
-- and what to do if you have a problem.
2
-2 Windows
2
-4 Keys
2
-6 Door Locks
2
-10 Remote Keyless Entry System
2
-16 Trunk
2
-17 Theft
2
-18 Content Theft-Deterrent (If Equipped)
2
-20 PASS-Key
III
2
-22 New Vehicle ªBreak-Inº
2
-22 Ignition Positions
2
-24 Starting Your Engine
2
-25 Engine Coolant Heater (If Equipped)
2
-26 Automatic Transaxle Operation
2
-29 Parking Brake
2
-30 Shifting Into PARK (P)
2
-33 Shifting Out of PARK (P)
2
-33 Parking Over Things That Burn
2
-34 Engine Exhaust2
-34 Running Your Engine While You're Parked
2
-35 Tilt Wheel
2
-36 Turn Signal/Multifunction Lever
2
-43 Exterior Lamps
2
-47 Interior Lamps
2
-50 Mirrors
2
-54 Storage Compartments
2
-58 OnStar
System (If Equipped)
2
-61 Sunroof (Option)
2
-62 HomeLink
Transmitter (If Equipped)
2
-66 The Instrument Panel -- Your
Information System
2
-68 Instrument Panel Clusters
2
-71 Warning Lights, Gages and Indicators
2
-82 Driver Information Center (DIC)
(If Equipped)
2
-92 Head-Up Display (HUD) (If Equipped)

2-25
NOTICE:
Your engine is designed to work with the
electronics in your vehicle. If you add electrical
parts or accessories, you could change the way
the engine operates. Before adding electrical
equipment, check with your dealer. If you don't,
your engine might not perform properly.
Engine Coolant Heater (If Equipped)
In very cold weather, 0
F (-18
C) or colder, the engine
coolant heater can help. You'll get easier starting and
better fuel economy during engine warm
-up. Usually, the
coolant heater should be plugged in a minimum of four
hours prior to starting your vehicle. At temperatures above
32
F (0
C), use of the coolant heater is not required.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The engine coolant heater cord is located on
the passenger's side of the vehicle, above the
headlamp assembly.3. Plug it into a normal, grounded 110
-volt AC outlet.
CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the wrong
kind of extension cord could overheat and cause
a fire. You could be seriously injured. Plug the
cord into a properly grounded three
-prong
11 0
-volt AC outlet. If the cord won't reach,
use a heavy
-duty three-prong extension cord
rated for at least 15 amps.
4. Before starting the engine, be sure to unplug and
store the cord as it was before to keep it away
from moving engine parts. If you don't, it could
be damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead of
trying to list everything here, we ask that you contact
your dealer in the area where you'll be parking your
vehicle. The dealer can give you the best advice for
that particular area.

2-76 Engine Coolant Temperature Gage
This gage shows the engine
coolant temperature. If the
pointer moves into the
shaded area, the engine
is too hot.
A temperature indicator light will turn on and a chime
will sound.
If you have been operating your vehicle under normal
driving conditions, and the temperature indicator light
comes on, you should pull off the road, stop your
vehicle and turn off the engine as soon as possible.
Malfunction Indicator Lamp
(Service Engine Soon Light)
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
This system is called OBD II (On
-Board
Diagnostics
-Second Generation) and is intended
to assure that emissions are at acceptable levels for
the life of the vehicle, helping to produce a cleaner
environment. The SERVICE ENGINE SOON light
comes on to indicate that there is a problem and service
is required. Malfunctions often will be indicated by the
system before any problem is apparent. This may
prevent more serious damage to your vehicle. This
system is also designed to assist your service technician
in correctly diagnosing any malfunction.

2-83
FUEL INFO (Information): Press this button to
display fuel information.
Press the FUEL INFO button until the display shows
FUEL ECONOMY AVERAGE. Average fuel economy
is viewed as a long term approximation of your overall
driving conditions. To learn the average fuel economy
from a new starting point, press the RESET button while
the average fuel economy is displayed in the DIC.
Press the FUEL INFO button until the display
shows FUEL ECONOMY INST. Instantaneous fuel
economy varies with your driving conditions, such as
acceleration, braking and the grade of the road being
traveled. The RESET button does not function in
this mode.
Press the FUEL INFO button until the display shows
FUEL RANGE. The fuel range will calculate the
remaining distance you can drive without refueling. This
calculation is based on the average fuel economy for the
last 25 miles (40.25 km) driven, and the fuel remaining
in the fuel tank. The RESET button does not function in
this mode.GAGE INFO (Information): Use this button to display
oil pressure, oil life, coolant temperature, tire pressure
and battery information.
Press the GAGE INFO button until OIL PRESSURE
appears in the display. If there are no problems detected
with the oil pressure, the display will show OIL
PRESSURE NORMAL. If a low oil pressure condition
is detected, the display will show OIL PRESSURE
LOW. If you see the OIL PRESSURE LOW message,
your vehicle could be low on oil or the oil is not going
through the engine properly. See your dealer for service.
Press the GAGE INFO button until COOLANT TEMP
appears in the display. If there are no problems detected
with the temperature, COOLANT TEMP NORMAL
will appear in the display. If the temperature is too high,
COOLANT TEMP HOT will appear in the display.
If you see the COOLANT TEMP HOT message,
the engine is overheated. You should pull off the road,
stop your vehicle and turn off your engine as soon as
possible. This manual explains what to do. See ªEngine
Overheatingº in the Index.

3-7
Sun and temperature sensors automatically adjust the air
temperature, the airflow direction and the fan speed to
maintain your temperature setting. The system may
supply cooler air to the side of the vehicle toward the
sun. Be careful not to put anything over the sensor on
top of the dash.
The display will show fan speed, temperature level
setting and airflow direction for a few seconds whenever
AUTO is selected, and then it will display the outside
temperature. The outside temperature reading is most
accurate when the vehicle is moving. During stops, the
display shows the previous temperature for best
accuracy and system control.
To find your preferred temperature setting, start with the
system in AUTO mode and the TEMP button adjusted
to 75
F (24
C), give the vehicle about 20 minutes to
stabilize, and adjust your temperature setting if
necessary, by using the TEMP button. The display will
show the temperature setting for a few seconds and then
it will display the outside temperature. If you want to
see your current automatic fan speed, airflow direction
and temperature setting, press the AUTO button.In cold weather, the system will delay turning on the fan,
to avoid blowing cold air. During this delay the system
will be in FRONT defrost mode and the light in the button
will come on and stay on as long as the display is showing
the current mode, set TEMP and FAN speed. This light
will go off when the display returns to the outside
temperature. The length of the delay depends on the
engine coolant temperature and the outside temperature.
Pushing the FAN, AIR FLOW or FRONT buttons will
override this delay, turn off the AUTO setting and return
the system to manual operation.
Personal Choice Comfort Controls
(If Equipped)
This feature enables up to two drivers to store and recall
comfort control settings for the temperature, fan speed
and the direction of the airflow.
The memory buttons (1 or 2) for this feature are located
on the driver's door panel and correspond to the
numbers (1 or 2) found on the back of each keyless
entry transmitter.
To recall comfort settings, press the unlock button on the
remote keyless entry transmitter and put the ignition in
ACCESSORY or RUN. The climate control setting last
chosen by the identified driver (1 or 2) will be recalled.

5-10
Engine Overheating
You will find a warning light about a hot engine as well
as an engine coolant temperature gage on your vehicle's
instrument panel cluster. If your vehicle is equipped
with the optional Driver Information Center (DIC),
an ENGINE COOLANT LOW warning will appear
on the display.
If Steam Is Coming From Your Engine
CAUTION:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it. Just turn it off and get everyone away
from the vehicle until it cools down. Wait until
there is no sign of steam or coolant before you
open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop your engine if
it overheats, and get out of the vehicle until the
engine is cool.
NOTICE:
If your engine catches fire because you keep
driving with no coolant, your vehicle can be
badly damaged. The costly repairs would not
be covered by your warranty.

5-12
Cooling System
When you decide it's safe to lift the hood, here's what
you'll see:
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Electric Engine Cooling Fans
CAUTION:
An electric engine cooling fan under the hood can
start up even when the engine is not running and
can injure you. Keep hands, clothing and tools
away from any underhood electric fan.
If the coolant inside the coolant recovery tank is boiling,
don't do anything else until it cools down. The vehicle
should be parked on a level surface.
See ªEngine Compartment
Overviewº in the Index
for more information
on location.

5-13
The coolant level should be at or above the FULL
COLD mark (if the engine is hot, the coolant level
should be at FULL HOT). If it isn't, you may have a
leak at the pressure cap or in the radiator hoses, heater
hoses, radiator, water pump or somewhere else in the
cooling system.
CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Don't touch them. If you
do, you can be burned.
Don't run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
If there seems to be no leak, with the engine on, check
to see if the electric engine cooling fans are running.
If the engine is overheating, both fans should be
running. If they aren't, your vehicle needs service.
NOTICE:
Engine damage from running your engine
without coolant isn't covered by your warranty.
NOTICE:
When adding coolant, it is important that you
use only DEX
-COOL
(silicate-free) coolant.
If coolant other than DEX-COOL is added
to the system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use of coolant other than DEX
-COOL
is not
covered by your new vehicle warranty.