Page 331 of 498
A. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 339.
B. Engine Coolant Recovery Tank. SeeCooling
System on page 349.
C. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 357.
D. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 356.
E. Automatic Transmission Fluid Dipstick (Out of
View). See “Checking the Fluid Level” under
Automatic Transmission Fluid on page 341.
F. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 334.G. Radiator Pressure Cap. SeeRadiator Pressure
Cap on page 347.
H. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 334.
I. Remote Negative (−) Terminal (Marked GND).
SeeJump Starting on page 362.
J. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 358.
K. Battery. SeeBattery on page 361.
L. Engine Compartment Fuse Block. SeeEngine
Compartment Fuse Block on page 435.
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A. Engine Coolant Recovery Tank. SeeCooling
System on page 349.
B. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 339.
C. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 357.
D. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 334.
E. Automatic Transmission Fluid Dipstick. See
“Checking the Fluid Level” underAutomatic
Transmission Fluid on page 341.
F. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 334.G. Radiator Pressure Cap. SeeRadiator Pressure
Cap on page 347.
H. Remote Negative (−) Terminal (Marked GND).
SeeJump Starting on page 362.
I. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 356.
J. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 358.
K. Engine Compartment Fuse Block. SeeEngine
Compartment Fuse Block on page 435.
L. Battery. SeeBattery on page 361.
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Page 344 of 498
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs
rst, if you add only DEX-COOL
®extended
life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have
a problem with engine overheating, seeEngine
Overheating on page 347.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as
they should.Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core, or
radiator corrosion. In addition, the engine
coolant may require changing sooner, at the
rst maintenance service after each
30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would not
be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
vehicle.
What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL®coolant. If you use
this coolant mixture, you do not need to add
anything else.
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Page 345 of 498
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as 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 would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.Notice:If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not be
covered by your warranty. Too much water
in the mixture can freeze and crack the engine,
radiator, heater core, and other parts.
If you have to add coolant more than four times
a year, have your dealer check your cooling
system.
Notice:If you use extra inhibitors and/or
additives in your vehicle’s cooling system,
you could damage your vehicle. Use only the
proper mixture of the engine coolant listed
in this manual for the cooling system.
SeeRecommended Fluids and Lubricants
on page 458for more information.
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Page 347 of 498
{CAUTION:
You can be burned if you spill coolant on
hot engine parts. Coolant contains
ethylene glycol, and it will burn if the
engine parts are hot enough. Do not spill
coolant on a hot engine.
Occasionally check the coolant level in the
radiator. For information on how to add coolant to
the radiator, seeCooling System on page 349.
Radiator Pressure Cap
Notice:If the pressure cap is not tightly
installed, coolant loss and possible engine
damage may occur. Be sure the cap is properly
and tightly secured.
SeeEngine Compartment Overview on page 330
for information on location.
Engine Overheating
You will nd a coolant temperature gage on your
vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 186for more
information.
If your vehicle has a Driver Information Center
(DIC), the display will show an Engine Coolant
Hot/Engine Overheated message. SeeDIC
Warnings and Messages on page 199for more
information.
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Page 349 of 498
If you no longer have the overheat warning,
you can drive. Just to be safe, drive slower for
about 10 minutes. If the warning does not
come back on, you can drive normally.
If the warning continues and you have not
stopped, pull over, stop, and park your vehicle
right away.
If there is still no sign of steam, you can push
down the accelerator until the engine speed
is about twice as fast as normal idle speed for
at least three minutes while you are parked. If you
still have the warning, turn off the engine and
get everyone out of the vehicle until it cools down.
You may decide not to lift the hood but to get
service help right away.Cooling System
When you decide it is safe to lift the hood, here is
what you will see:
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
4.2L L6 Engine
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Page 350 of 498
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine FanIf the coolant inside the coolant recovery tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
The coolant level should
be at least up to the
FULL COLD mark.
If it is not, 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.
5.3L V8 Engine
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{CAUTION:
Heater and radiator hoses, and other
engine parts, can be very hot. Do not
touch them. If you do, you can be burned.
Do not run the engine if there is a leak.
If you run the engine, it could lose all
coolant. That could cause an engine re,
and you could be burned. Get any leak
xed before you drive the vehicle.
If there seems to be no leak, start the engine
again. The engine cooling fan speed should
increase when idle speed is doubled by pushing
the accelerator pedal down. If it does not,
your vehicle needs service. Turn off the engine.Notice:Engine damage from running your
engine without coolant is not covered by
your warranty.
Notice:Using coolant other than DEX-COOL®
may cause premature engine, heater core,
or radiator corrosion. In addition, the engine
coolant could require changing sooner, at
30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would not
be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
vehicle.
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