
4-2 Instruments and Controls
Vehicle Messages
Vehicle Messages . . . . . . . . . . . 4-27
Battery Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . 4-28
Brake System Messages . . . . 4-28
Compass Messages . . . . . . . . . 4-28
Cruise Control Messages . . . . 4-28
Door Ajar Messages . . . . . . . . . 4-29
Engine Cooling System Messages . . . . . . . . . . . . . . . . . . 4-29
Engine Oil Messages . . . . . . . . 4-30
Engine Power Messages . . . . 4-30
Fuel System Messages . . . . . . 4-30
Key and Lock Messages . . . . . 4-31 Object Detection System
Messages . . . . . . . . . . . . . . . . . . 4-31
Ride Control System Messages . . . . . . . . . . . . . . . . . . 4-31
Airbag System Messages . . . . 4-32
Safety Belt Messages . . . . . . . 4-32
Anti-Theft Alarm System
Messages . . . . . . . . . . . . . . . . . . 4-32
Service Vehicle Messages . . . 4-32
Tire Messages . . . . . . . . . . . . . . . 4-33
Transmission Messages . . . . . 4-33
Vehicle Reminder Messages . . . . . . . . . . . . . . . . . . 4-34
Vehicle Personalization
Vehicle Personalization . . . . . . 4-34
OnStar®System
OnStar®System . . . . . . . . . . . . . 4-39

8-30 Driving and Operating
Starting the Engine
Move the shift lever to P (Park) or
N (Neutral). The engine will not start
in any other position. To restart the
vehicle when it is already moving,
use N (Neutral) only.
Notice:Do not try to shift to
P (Park) if the vehicle is moving.
If you do, you could damage the
transmission. Shift to P (Park)
only when the vehicle is stopped.
Starting Procedure
1. With your foot off the accelerator
pedal, turn the ignition key to
START. When the engine starts,
let go of the key. The idle speed
will go down as the engine
warms. Do not race the engine
immediately after starting it.
Operate the engine and
transmission gently to allow
the oil to warm up and lubricate
all moving parts. The vehicle has a
Computer-Controlled Cranking
System. This feature assists in
starting the engine and protects
components. If the ignition key is
turned to the START position,
and then released when the
engine begins cranking, the
engine will continue cranking for
a few seconds or until the
vehicle starts. If the engine does
not start and the key is held in
START for many seconds,
cranking will be stopped after
15 seconds to prevent cranking
motor damage. To prevent gear
damage, this system also
prevents cranking if the engine
is already running. Engine
cranking can be stopped by
turning the ignition switch to
ACC/ACCESSORY or
LOCK/OFF.
Notice:
Cranking the engine for
long periods of time, by returning
the key to the START position
immediately after cranking has
ended, can overheat and damage
the cranking motor, and drain the
battery. Wait at least 15 seconds
between each try, to let the
cranking motor cool down.
2. If the engine does not start after
5 to 10 seconds, especially in
very cold weather (below −18°C
or 0°F), it could be flooded with
too much gasoline. Push the
accelerator pedal all the way to
the floor and holding it there as
you hold the key in START for a
maximum of 15 seconds. Wait at
least 15 seconds between each
try, to allow the cranking motor
to cool. When the engine starts,
let go of the key and accelerator.

Driving and Operating 8-31
If the vehicle starts briefly but
then stops again, repeat the
procedure. This clears the extra
gasoline from the engine. Do not
race the engine immediately
after starting it. Operate the
engine and transmission gently
until the oil warms up and
lubricates all moving parts.
Notice: The engine is designed to
work with the electronics in the
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 do not, the engine
might not perform properly. Any
resulting damage would not be
covered by the vehicle warranty.Engine Coolant Heater
The engine coolant heater,
if available, can help in cold weather
conditions at or below −18°C (0°F)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting the
vehicle. An internal thermostat in
the plug-end of the cord will prevent
engine coolant heater operation at
temperatures above −18°C (0°F).
To Use The Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap the
electrical cord.
The electrical cord is located on
the passenger side of the engine
compartment, in front of the air
cleaner.
3. Plug it into a normal, grounded 110-volt AC outlet.
{WARNING
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 110-volt AC outlet.
If the cord will not 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 do not it could be
damaged.
The length of time the heater should
remain plugged in depends on
several factors. Ask a dealer in the
area where you will be parking the
vehicle for the best advice on this.

8-60 Driving and Operating
Making Turns
Notice:Making very sharp turns
while trailering could cause the
trailer to come in contact with the
vehicle. The vehicle could be
damaged. Avoid making very
sharp turns while trailering.
When turning with a trailer, make
wider turns than normal so the
trailer will not strike soft shoulders,
curbs, road signs, trees or other
objects. Use the turn signal well in
advance and avoid jerky or sudden
maneuvers.
Turn Signals When Towing
a Trailer
The turn signal indicators on the
instrument panel flash whenever
signaling a turn or lane change.
Properly hooked up, the trailer
lamps also flash, telling other
drivers the vehicle is turning,
changing lanes or stopping.
When towing a trailer, the arrows
on the instrument panel flash for
turns even if the bulbs on the trailer are burned out. Check occasionally
to be sure the trailer bulbs are still
working.
Driving On Grades
Reduce speed and shift to a lower
gear before starting down a long or
steep downgrade. If the
transmission is not shifted down, the
brakes might have to be used so
much that they would get hot and no
longer work well.
The vehicle can tow in D (Drive).
Use a lower gear if the transmission
shifts too often.
When towing at high altitude on
steep uphill grades, engine coolant
will boil at a lower temperature than
at normal altitudes. If the engine is
turned off immediately after towing
at high altitude on steep uphill
grades, the vehicle may show signs
similar to engine overheating. To
avoid this, let the engine run while
parked, preferably on level ground,
with the transmission in P (Park) for
a few minutes before turning the
engine off. If the overheat warning
comes on, see
Engine Overheating
on page 9‑18.
Parking on Hills
{WARNING
Parking the vehicle on a hill with
the trailer attached can be
dangerous. If something goes
wrong, the rig could start to move.
People can be injured, and both
the vehicle and the trailer can be
damaged. When possible, always
park the rig on a flat surface.
If parking the rig on a hill:
1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if facing
downhill or into traffic if facing
uphill.
2. Have someone place chocks under the trailer wheels.

Driving and Operating 8-61
3. When the wheel chocks are inplace, release the brake pedal
until the chocks absorb the load.
4. Reapply the brake pedal. Then apply the parking brake and shift
into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift into a gear.
4. Release the parking brake.
5. Let up on the brake pedal.
6. Drive slowly until the trailer is clear of the chocks.
7. Stop and have someone pick up and store the chocks.
Maintenance When Trailer
Towing
The vehicle needs service more
often when pulling a trailer. See this
manual's Maintenance Schedule or
Index for more information. Things
that are especially important in
trailer operation are automatic
transmission fluid, engine oil, axle
lubricant, belts, cooling system and
brake system. Inspect these before
and during the trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Engine Cooling When Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. See Engine Overheating
on page 9‑18.
Trailer Towing
Before pulling a trailer, there are
three important considerations that
have to do with weight:
.The weight of the trailer
.The weight of the trailer tongue
.The total weight on the vehicle's
tires
Weight of the Trailer
How heavy can a trailer safely be?
Speed, altitude, road grades,
outside temperature, special
equipment, and the amount of
tongue weight the vehicle can carry
must be considered. See “Weight of
the Trailer Tongue” later in this
section for more information.
Maximum trailer weight is calculated
assuming only the driver is in the
tow vehicle and it has all the
required trailering equipment.
The weight of additional optional
equipment, passengers and cargo in
the tow vehicle must be subtracted
from the maximum trailer weight.

Vehicle Care 9-1
Vehicle Care
General Information
General Information . . . . . . . . . . . 9-3
California Proposition65 Warning . . . . . . . . . . . . . . . . . . 9-3
California Perchlorate Materials Requirements . . . . . . . . . . . . . . . 9-3
Accessories and Modifications . . . . . . . . . . . . . . . . 9-4
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . 9-4
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 9-6
Engine Cover . . . . . . . . . . . . . . . . . 9-9
Engine Oil . . . . . . . . . . . . . . . . . . . 9-10
Engine Oil Life System . . . . . . . 9-11
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . 9-12 Engine Air Cleaner/Filter . . . . . 9-13
Cooling System . . . . . . . . . . . . . . 9-14
Engine Coolant . . . . . . . . . . . . . . 9-15
Engine Overheating . . . . . . . . . 9-18
Power Steering Fluid (2.4L
L4 Engine) . . . . . . . . . . . . . . . . . 9-20
Power Steering Fluid (3.0L V6 Engine) . . . . . . . . . . . . . . . . . 9-20
Washer Fluid . . . . . . . . . . . . . . . . 9-21
Brakes . . . . . . . . . . . . . . . . . . . . . . . 9-21
Brake Fluid . . . . . . . . . . . . . . . . . . 9-22
Battery . . . . . . . . . . . . . . . . . . . . . . . 9-24
All-Wheel Drive . . . . . . . . . . . . . . 9-24
Starter Switch Check . . . . . . . . 9-25
Automatic Transmission Shift Lock Control System
Check . . . . . . . . . . . . . . . . . . . . . . 9-25
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . 9-25
Park Brake and P (Park) Mechanism Check . . . . . . . . . 9-26
Wiper Blade Replacement . . . 9-26
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 9-27
Bulb Replacement
Bulb Replacement . . . . . . . . . . . 9-30
Headlamps, Front Turn Signal, Sidemarker, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 9-30
Fog Lamps . . . . . . . . . . . . . . . . . . 9-31
Taillamps, Turn Signal, Sidemarker, Stoplamps,
and Back-Up Lamps . . . . . . . 9-32
License Plate Lamp . . . . . . . . . . 9-33
Replacement Bulbs . . . . . . . . . . 9-34
Electrical System
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 9-34
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . 9-34
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . 9-37

9-12 Vehicle Care
once a year and at this time the
system must be reset. Your dealer
has trained service people who will
perform this work using genuine
parts and reset the system. It is also
important to check the oil regularly
and keep it at the proper level.
If the system is ever reset
accidentally, the oil must be
changed at 5 000 km (3,000 miles)
since the last oil change.
Remember to reset the oil life
system whenever the oil is changed.
How to Reset the Engine Oil
Life System
Reset the system whenever the
engine oil is changed so that the
system can calculate the next
engine oil change. To reset the
system:
1. Turn the ignition to ON/RUN withthe engine off.
2. Fully press and release the accelerator pedal three times
within five seconds. If the vehicle has Driver Information
Center (DIC) buttons:
1. Turn the ignition to ON/RUN,
with the engine off.
2. Press the DIC menu button until “Remaining Oil Life” displays.
3. Press and hold the set/clear button until “100%”is displayed.
4. Turn the key to LOCK/OFF.
The system is reset when the
“Change Engine Oil Soon” message
goes off.
What to Do with Used Oil
Used engine oil contains elements
that can be unhealthy for your skin
and could even cause cancer. Do
not let used oil stay on your skin.
Clean your skin and nails with soap
and water, or a good hand cleaner.
Wash or properly dispose of clothing
or rags. 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 filter 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. Recycle it by taking it to a
place that collects used oil.
Automatic Transmission
Fluid
How to Check Automatic
Transmission Fluid
It is not necessary to check the
transmission fluid level.
A transmission fluid leak is the only
reason for fluid loss. If a leak
occurs, take the vehicle to your
dealer service department and have
it repaired as soon as possible.

Vehicle Care 9-13
There is a special procedure for
checking and changing the
transmission fluid. Because this
procedure is difficult, this should be
done at your dealer service
department. Contact your dealer for
additional information or the
procedure can be found in the
service manual. To purchase a
service manual, seeService
Publications Ordering Information
on
page 12‑12.
Change the fluid and filter at the
intervals listed in Scheduled
Maintenance
on page 10‑2, and be
sure to use the fluid listed in
Recommended Fluids and
Lubricants on page 10‑7.
Engine Air Cleaner/Filter
See Engine Compartment Overviewon page 9‑6for the location of the
engine air cleaner/filter.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the
Maintenance IIintervals and replace
it at the first oil change after each
80 000 km (50,000 mile) interval.
See Scheduled Maintenance
on
page 10‑2for more information.
If driving in dusty/dirty conditions,
inspect the filter at each engine oil
change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter,
remove the filter from the vehicle
and lightly shake the filter to release
loose dust and dirt. If the filter
remains caked with dirt, a new filter
is required. To inspect or replace the engine air
cleaner/filter:
1. Open the hood. See
Hood
on
page 9‑5.
2. Locate the air filter housing on the front passenger side of the
engine compartment. See
Engine Compartment Overview
on page 9‑6.
3. Remove the four air cleaner
housing cover screws.
4. Pull straight up on cover, and while holding the cover, remove
the air filter.