Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
A. Engine Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Cooling Fans{CAUTION
An electric engine cooling fan
under the hood can start up even
when the engine is not running
and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.
{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.Notice:Using coolant other than
DEX-COOL
®can 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
the vehicle warranty. Always use
DEX-COOL
®(silicate-free) coolant
in the vehicle.
Engine Coolant
The cooling system in the vehicle
is lled with DEX-COOL®engine
coolant. The coolant is designed to
remain in the vehicle for ve years
or 150,000 miles (240 000 km),
whichever occurs rst.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
seeEngine Overheating on
page 5-23.
Service and Appearance Care 5-19
ProCarManuals.com
What to Use
{CAUTION
Adding only plain water to the
cooling system can be dangerous.
Plain water, or some other liquid
such as alcohol, can boil before
the proper coolant mixture will.
The vehicle’s coolant warning
system is set for the proper
coolant mixture. With plain water
or the wrong mixture, the engine
could get too hot but you would
not get the overheat warning.
The engine could catch re and
you or others could be burned.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®
coolant.Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
Gives freezing protection
down to−34°F (−37°C), outside
temperature.
Gives boiling protection up
to 265°F (129°C), engine
temperature.
Protects against rust and
corrosion.
Will not damage aluminum parts.
Helps keep the proper engine
temperature.Notice:If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and other
parts.
Notice:If extra inhibitors
and/or additives are used in the
vehicle’s cooling system, the
vehicle could be damaged. Use
only the proper mixture of the
engine coolant listed in this
manual for the cooling system.
SeeRecommended Fluids and
Lubricants on page 6-12for more
information.
5-20 Service and Appearance Care
ProCarManuals.com
If you do decide to lift the hood,
make sure the vehicle is parked
on a level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, both fans
should be running. If they are
not, do not continue to run the
engine and have the vehicle
serviced.
Notice:Engine damage from
running the engine without
coolant is not covered by the
warranty.
Notice:If the engine catches re
while driving with no coolant, the
vehicle can be badly damaged.
The costly repairs would not be
covered by the vehicle warranty.
SeeOverheated Engine Protection
Operating Mode on page 5-25for
information on driving to a safe
place in an emergency.If Steam Is Coming From The
Engine Compartment
{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. 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 the
vehicles engine is overheated, the
liquids in it can catch re. You or
others could be badly burned.
Stop the engine if it overheats,
and get out of the vehicle until the
engine is cool.
SeeOverheated Engine Protection
Operating Mode on page 5-25for
information on driving to a safe
place in an emergency.
If No Steam Is Coming From
The Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem may not be too
serious. Sometimes the engine can
get a little too hot when the vehicle:
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
Tows a trailer.
If the overheat warning is displayed
with no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest
temperature and to the highest
fan speed. Open the windows as
necessary.
3. If in a traffic jam, shift to
N (Neutral), otherwise, shift
to the highest gear while
driving — D (Drive) or L (Low).
5-24 Service and Appearance Care
ProCarManuals.com
Driver
Seat Height Adjuster........... 1-3
Driver Information
Center (DIC)....................3-44
DIC Operation and
Displays...............3-45, 3-50
DIC Vehicle
Customization...............3-65
DIC Warnings and
Messages....................3-56
Driving
At Night..........................4-11
Before a Long Trip............4-13
Defensive.......................... 4-2
Drunk............................... 4-2
Highway Hypnosis............4-13
Hill and Mountain Roads.....4-14
In Rain and on
Wet Roads...................4-12
Loss of Control................4-10
Off-Road Recovery............. 4-9
Rocking Your Vehicle to
Get it Out ....................4-18
Winter.............................4-15
Driving for Better Fuel
Economy........................... 4-1Dual Automatic Climate
Control System.................3-22
DVD
Rear Seat Entertainment
System......................3-114
E
EDR ..................................7-16
Electrical Equipment
Add-On Equipment............5-92
Electrical System
Fuses and Circuit
Breakers......................5-92
Instrument Panel Fuse
Block...........................5-92
Power Windows and Other
Power Options..............5-92
Underhood Fuse Block......5-94
Windshield Wiper Fuses....5-92
Electronic Immobilizer
PASS-Key
®III+................2-18
Electronic Immobilizer
Operation
PASS-Key
®III+................2-18Engine
Air Cleaner/Filter...............5-17
Check and Service Engine
Soon Lamp..................3-39
Compartment Overview......5-12
Coolant...........................5-19
Coolant Heater.................2-23
Coolant
Temperature Gage.........3-38
Coolant Temperature
Warning Light...............3-38
Cooling System................5-19
Drive Belt Routing.............6-15
Exhaust...........................2-30
Oil ..................................5-13
Oil Life System.................5-15
Overheated Protection
Operating Mode............5-25
Overheating.....................5-23
Starting...........................2-22
Entry Lighting......................3-14
Event Data Recorders..........7-17
Extender, Safety Belt............1-28
Exterior Lamps....................3-11
i-4 INDEX
ProCarManuals.com
F
Filter
Engine Air Cleaner............5-17
Finish Damage....................5-90
Flashers, Hazard Warning....... 3-5
Flash-to-Pass........................ 3-7
Flat Tire..............................5-61
Flat Tire, Changing...............5-70
Flat Tire, Storing..................5-80
Floor Mats..........................2-51
Fluid
Automatic Transmission.....5-18
Power Steering.................5-25
Windshield Washer...........5-26
Fog Lamp
Fog ................................3-13
Fog Lamp Light...................3-43
Fuel..................................... 5-5
Additives........................... 5-6
California Fuel................... 5-6
Economy Driving................ 4-1
Filling a Portable Fuel
Container.....................5-10
Filling the Tank.................. 5-8
Fuels in Foreign Countries.... 5-7Fuel (cont.)
Gage ..............................3-44
Gasoline Octane................ 5-5
Gasoline Speci cations........ 5-5
Fuses
Fuses and Circuit
Breakers......................5-92
Instrument Panel Fuse
Block...........................5-92
Underhood Fuse Block......5-94
Windshield Wiper..............5-92
G
Gage
Speedometer...................3-32
Tachometer......................3-32
Voltmeter Gage................3-35
Gages
Engine Coolant
Temperature.................3-38
Fuel................................3-44
Garage Door Opener............2-45
Gasoline
Octane............................. 5-5
Speci cations..................... 5-5Glove Box...........................2-50
GM Mobility Reimbursement
Program............................ 7-6
H
Halogen Bulbs.....................5-36
Hazard Warning Flashers........ 3-5
Head Restraints..................... 1-2
Headlamp
Aiming ............................5-35
Headlamps
Bulb Replacement.............5-35
Daytime Running
Lamps/Automatic
Headlamp System.........3-12
Delayed..........................3-12
Exterior Lamps.................3-11
Flash-to-Pass..................... 3-7
High Intensity Discharge
(HID) Lighting...............5-36
High/Low Beam Changer..... 3-7
Heated Seats........................ 1-5
Heater................................3-19
Engine Coolant.................2-23
Height Adjuster, Driver Seat...... 1-3
INDEX i-5
ProCarManuals.com