Engine Cooling System
Messages
A/C Off Due to High
Engine Temp
This message displays when the
engine coolant becomes hotter than
the normal operating temperature.
To avoid added strain on a hot
engine, the air conditioning
compressor automatically turns off.
When the coolant temperature
returns to normal, the air conditioning
compressor turns back on. You can
continue to drive your vehicle.
If this message continues to appear,
have the system repaired by your
dealer/retailer as soon as possible
to avoid damage to the engine.
Coolant Level Low Add
Coolant
This message will display if the
coolant is low, seeEngine Coolant
on page 9-19.
Engine Overheated — Idle
Engine
This message displays when the
engine coolant temperature is
too hot. Stop and allow the vehicle
to idle until it cools down.
Engine Overheated — Stop
Engine
This message displays and a
continuous chime sounds if the
engine cooling system reaches
unsafe temperatures for operation.
Stop and turn off the vehicle as
soon as it is safe to do so to avoid
severe damage. This message
clears when the engine has cooled
to a safe operating temperature.
High Coolant Temperature
This message displays if the coolant
temperature is hot, seeEngine
Overheating on page 9-24.
Engine Oil Messages
Change Engine Oil Soon
This message displays when the
engine oil needs to be changed.
When you change the engine oil,
be sure to reset the CHANGE
ENGINE OIL SOON message.
SeeEngine Oil Life System
on page 9-13andDriver Information
Center (DIC) on page 4-27for
information on how to reset
the message. SeeEngine Oil
on page 9-10andScheduled
Maintenance on page 10-2for
more information.
Engine Oil Hot, Idle Engine
This message displays when
the engine oil temperature is too
hot. Stop and allow the vehicle
to idle until it cools down.
Engine Oil Low – Add Oil
This message displays when
the engine oil level is too low.
Check the oil level. SeeEngine Oil
on page 9-10.
4-32 Instruments and Controls
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 underhood fuse block
for V6 models.
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/
retailer in the area where you will
be parking the vehicle for the best
advice on this.
Shifting Into Park
{WARNING
It can be dangerous to get out of
the vehicle if the shift lever is not
fully in P (Park) with the parking
brake firmly set. The vehicle can
roll. If you have left the engine
running, the vehicle can move
suddenly. You or others could be
injured. To be sure the vehicle will
not move, even when you are on
fairly level ground, use the steps
that follow. If you are pulling a
trailer, seeDriving Characteristics
and Towing Tips on page 8-49.
Use this procedure to shift into
P (Park):
1. Hold the brake pedal down and
set the parking brake.
SeeParking Brake on page 8-32
for more information.
2. Hold the button on the shift lever
and push the lever toward the
front of the vehicle into P (Park).
Driving and Operating 8-21
Backing Up
Hold the bottom of the steering
wheel with one hand. Then, to move
the trailer to the left, move that
hand to the left. To move the trailer
to the right, move your hand to
the right. Always back up slowly
and, if possible, have someone
guide you.
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. Do this so
the trailer won’t strike soft shoulders,
curbs, road signs, trees or other
objects. Avoid jerky or sudden
maneuvers. Signal well in advance.
Turn Signals When Towing a
Trailer
The arrows 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. For this reason you
may think other drivers are seeing
the signal when they are not. It is
important to 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.Vehicles with an automatic
transmission can tow in D (Drive).
Shift the transmission to a lower
gear if the transmission shifts
too often under heavy loads and/or
hilly conditions. For vehicles with
a manual transmission, it is
better not to use the highest gear.
When towing at high altitude on
steep uphill grades, consider the
following: 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 automatic transmission
in P (Park) for a few minutes
before turning the engine off.
Driving and Operating 8-51
Vehicle Care
General InformationGeneral Information...............9-2
California Proposition 65
Warning.............................9-2
California Perchlorate
Materials Requirements........9-3
Accessories and
Modifications.......................9-3
Vehicle ChecksDoing Your Own
Service Work......................9-4
Hood...................................9-5
Engine Compartment
Overview............................9-6
Engine Cover.......................9-9
Engine Oil..........................9-10
Engine Oil Life System.........9-13
Automatic Transmission
Fluid................................9-14
Manual Transmission Fluid. . . .9-15
Hydraulic Clutch..................9-15
Engine Air Cleaner/Filter.......9-16
Cooling System...................9-17
Engine Coolant...................9-19
Engine Overheating.............9-24
Power Steering Fluid............9-25Washer Fluid......................9-26
Brakes...............................9-27
Brake Fluid.........................9-28
Battery...............................9-29
Rear Axle...........................9-30
Starter Switch Check............9-31
Automatic Transmission
Shift Lock Control
System Check...................9-32
Ignition Transmission
Lock Check.......................9-32
Park Brake and P (Park)
Mechanism Check..............9-32
Wiper Blade Replacement......9-33Headlamp AimingHeadlamp Aiming................9-34
Bulb ReplacementBulb Replacement...............9-37
Halogen Bulbs....................9-37
High Intensity Discharge
(HID) Lighting....................9-37
Headlamps, Front Turn
Signal and Parking Lamps
(Base Vehicle)...................9-37
Headlamps, Front Turn
Signal and Parking Lamps
(Up-Level Vehicle)..............9-38
Daytime Running
Lamps (DRL)....................9-39
Fog Lamps.........................9-40Taillamps, Turn Signal, and
Stoplamps.........................9-40
License Plate Lamp.............9-40
Replacement Bulbs..............9-41
Electrical SystemElectrical System
Overload...........................9-41
Fuses and Circuit
Breakers...........................9-42
Engine Compartment
Fuse Block.......................9-42
Instrument Panel
Fuse Block.......................9-45
Rear Compartment
Fuse Block.......................9-46
Wheels and TiresTires..................................9-48
Winter Tires........................9-48
Tire Sidewall Labeling..........9-49
Tire Designations.................9-51
Tire Terminology and
Definitions.........................9-52
Tire Pressure......................9-54
Tire Pressure for
High-Speed Operation........9-56
Tire Pressure Monitor
System.............................9-56
Tire Pressure Monitor
Operation..........................9-57
Tire Inspection....................9-61
Vehicle Care 9-1
A. Coolant Recovery Bottle
B. Electric Cooling Fans
C. Radiator Cap
{WARNING
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.
If the coolant inside the coolant
recovery bottle 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
between the MIN and MAX lines.
If it is not, you may have a leak at
the radiator hoses, heater hoses,
radiator, water pump, or somewhere
else in the cooling system.
{WARNING
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 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,
the fans should be running. If it is
not, your vehicle needs service.
Turn off the engine. 6.2 L V8 Engines
(L99 shown LS3 similar)
9-18 Vehicle Care
Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
Check coolant as follows:
1. Turn the ignition OFF.
2. Locate the coolant recovery
bottle. SeeEngine Compartment
Overview on page 9-6.
3. Turn the coolant dipstick cap
counterclockwise and slowly
pull out the dipstick.4. There are maximum and
minimum markings on the
dipstick. When the engine is
cold, the coolant level should
be at or above the MIN mark on
the dipstick. After the vehicle has
been driven and the engine is at
normal operating temperature,
the level should be somewhere
between half full and the
maximum mark.
5. If the coolant level is correct,
replace the dipstick and turn
the cap clockwise to secure.
How to Add Coolant to the
Coolant Recovery Bottle
{WARNING
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.
Notice:This vehicle has a
speci c coolant ll procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged.
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.
9-20 Vehicle Care
Add coolant as follows:
1. Turn the coolant overflow bottle
dipstick cap counterclockwise
and slowly pull out the dipstick.
2. Pour the coolant into the coolant
recovery bottle.
3. When the level is correct,
replace the dipstick and turn
the cap clockwise to secure.
How to Add Coolant to the
Radiator
{WARNING
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.Notice:This vehicle has a
speci c coolant ll procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged.
{WARNING
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.
{WARNING
Steam and scalding liquids from
a hot cooling system can blow
out and burn you badly. They are
under pressure, and if you turn the
surge tank pressure cap — even a
little — they can come out at high
speed. Never turn the cap when
the cooling system, including the
surge tank pressure cap, is hot.
Wait for the cooling system and
surge tank pressure cap to cool
if you ever have to turn the
pressure cap.
If coolant is needed, add the proper
mixture directly to the radiator,
but be sure the cooling system
is cool before this is done.
Vehicle Care 9-21
If no coolant is visible in the coolant
overflow bottle, add coolant as
follows:
3.6 L V6 Engine Fill Procedure
1. Locate the radiator cap.
SeeEngine Compartment
Overview on page 9-6.
2. Remove engine cover to access
the radiator cap. SeeEngine
Cover on page 9-9.
3. Cover the radiator cap with a
thick cloth and turn it slowly
counterclockwise and remove.
4. If there is no coolant visible or
the level is low, slowly fill the
system through the radiator cap
opening with a 50/50 mixture
of DEX-COOL
®and clean
drinkable water.Wait 30 seconds for coolant to
settle and continue filling if
the level drops.
Do not spill coolant on the
accessory drive belts.
If a spill occurs, rinse the belt
with fresh water.
5. Start the engine.
6. With the engine idling, continue
to add coolant through the
radiator cap opening until full.
Wait 30 seconds for the coolant
to settle and top off, if the level
drops.
7. Once the system is full, put the
radiator cap back on by turning
clockwise.
8. With the engine still running,
raise the engine to 2500 RPM
for 30–40 seconds.
9. Turn the engine OFF.
10. Repeat steps 2–7 then turn the
engine off.11. Allow engine to cool for
45 minutes. Top off coolant
through the radiator cap
opening and re-install the
radiator cap.
12. Re-install the engine cover.
SeeEngine Cover on
page 9-9.
13. Check the coolant level in the
coolant recovery bottle and fill
it until the level is at the top
symbol on the dipstick.
9-22 Vehicle Care