Page 214 of 368
First Edition for Buick LeSabre Owner's Manual ± 1999
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5-12
Cooling System
When you decide it's safe to lift the hood, here's what
you'll see:
H±45±0741±T
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.
H±45±0742±T
Page 216 of 368

First Edition for Buick LeSabre Owner's Manual ± 1999
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5-14 How to Add Coolant to the Coolant
Recovery Tank
If you haven't found a problem yet, but the coolant level
isn't at the FULL COLD mark, add a 50/50 mixture of
clean, drinkable water and DEX
-COOL engine
coolant at the coolant recovery tank. (See ªEngine
Coolantº in the Index for more information.)
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mixture will. Your vehicle's coolant
warning system is set for the proper coolant
mixture. With plain water or the wrong mixture,
your engine could get too hot but you wouldn't
get the overheat warning. Your engine could
catch fire and you or others could be burned. Use
a 50/50 mixture of clean, drinkable water and
DEX
-COOL coolant.
NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts. Use
the recommended coolant and the proper
coolant mixture.
H±45±0326±T
Page 230 of 368

First Edition for Buick LeSabre Owner's Manual ± 1999
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5-28
X±05±0617±T
7. Remove any rust or dirt
from the wheel bolts,
mounting surfaces and
spare wheel.
CAUTION:
Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel nuts
become loose after a time. The wheel could come
off and cause an accident. When you change a
wheel, remove any rust or dirt from the places
where the wheel attaches to the vehicle. In an
emergency, you can use a cloth or a paper towel
to do this; but be sure to use a scraper or wire
brush later, if you need to, to get all the rust or
dirt off.
CAUTION:
Never use oil or grease on studs or nuts. If you
do, the nuts might come loose. Your wheel could
fall off, causing a serious accident.
8. Place the compact spare tire on the
wheel
-mounting surface.
C±46±3616±L
9. Replace the wheel nuts
with the rounded end of
the nuts toward
the wheel.
10. Make sure each wheel stud is centered in each wheel
hole while tightening the nuts. Tighten each nut by
hand until the wheel is held against the hub.
Page 237 of 368

6-
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6-1
Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section begins with service and fuel information,
and then it shows how to check important fluid and lubricant levels. There is also technical information about your
vehicle, and a part devoted to its appearance care.
6
-2 Service
6
-3 Fuel
6
-5 Fuels in Foreign Countries
6
-5 Filling Your Tank
6
-7 Filling a Portable Fuel Container
6
-8 Checking Things Under the Hood
6
-11 Engine Oil
6
-16 Engine Air Cleaner/Filter
6
-18 Automatic Transaxle Fluid
6
-22 Radiator Pressure Cap
6
-22 Engine Coolant
6
-25 Power Steering Fluid
6
-26 Windshield Washer Fluid
6
-27 Brakes
6
-31 Battery
6
-31 Bulb Replacement
6
-40 Windshield Wiper Blade Replacement
6
-40 Tires6
-48 Appearance Care
6
-49 Cleaning the Inside of Your Vehicle
6
-51 Care of Safety Belts
6
-51 Cleaning Glass Surfaces
6
-51 Cleaning the Outside of Your Vehicle
6
-54 Cleaning Aluminum Wheels (IF EQUIPPED)
6
-54 Cleaning Tires
6
-54 Sheet Metal Damage
6
-55 Finish Damage
6
-56 GM Vehicle Care/Appearance Materials
6
-57 Vehicle Identification Number (VIN)
6
-57 Service Parts Identification Label
6
-58 Electrical System
6
-63 Replacement Bulbs
6
-64 Capacities and Specifications
6
-64 Air Conditioning Refrigerants
6
-65 Normal Maintenance Replacement Parts
Page 241 of 368
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6-5
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard to
find. Never use leaded gasoline or any other fuel not
recommended in the previous text on fuel. Costly repairs
caused by use of improper fuel wouldn't be covered by
your warranty.
To check on fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you'll be driving.
You can also write us at the following address for
advice. Just tell us where you're going and give your
Vehicle Identification Number (VIN).
General Motors Overseas Distribution Corporation
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Filling Your Tank
The cap is behind a hinged door on the driver's side of
your vehicle.
Page 244 of 368
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6-8
Checking Things Under the Hood
CAUTION:
An electric fan under the hood can start up and
injure you even when the engine is not running.
Keep hands, clothing and tools away from any
underhood electric fan.
CAUTION:
Things that burn can get on hot engine parts and
start a fire. These include liquids like gasoline,
oil, coolant, brake fluid, windshield washer and
other fluids, and plastic or rubber. You or others
could be burned. Be careful not to drop or spill
things that will burn onto a hot engine.
Hood Release
To open the hood, first pull
the hood release handle
inside the vehicle. It is next
to the parking brake pedal
near the floor.
Page 246 of 368
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6-10 3800 Series II Engine (L36 - Code K)
When you open the hood, you'll see:
A. Engine Coolant
Recovery Tank
B. Battery
C. Radiator Pressure CapD. Engine Oil Dipstick
E. Engine Oil Fill Cap
F. Automatic Transaxle
Fluid DipstickG. Brake Master Cylinder
H. Air Cleaner
I. Windshield Washer
Fluid Reservoir
Page 247 of 368
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6-11
Engine Oil
If the CHECK OIL LEVEL
light on the instrument
panel comes on, it means
you need to check your
engine oil level right away.
For more information, see ªCheck Oil Level Lightº in
the Index. You should check your engine oil level
regularly; this is an added reminder.
It's a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the oil must
be warm and the vehicle must be on level ground.
The engine oil dipstick is
right behind the engine fans
and in front of the engine
oil fill cap. The top of
the dipstick is a round,
yellow loop.
Turn off the engine and give the oil several minutes to
drain back into the oil pan. If you don't, the oil dipstick
might not show the actual level.