
DIC Warnings and MessagesMessages are displayed on the DIC to notify the driver
that the status of the vehicle has changed and that some
action may be needed by the driver to correct the
condition. Multiple messages may appear one after
another. Some messages may not require immediate
action, but you can press the set/reset button to
acknowledge that you received the message and clear
it from the DIC display. Pressing any of the DIC buttons
also acknowledges and clears any messages. Some
messages cannot be cleared from the DIC display
because they are more urgent. These messages require
action before they can be cleared. You should take any
messages that appear on the display seriously and
remember that clearing the messages will only make
the messages disappear, not correct the problem.
The following are the possible messages that can be
displayed and some information about them.AUTOMATIC LIGHT CONTROL OFFThis message displays when the automatic headlamps
are turned off. SeeExterior Lamps on page 4-9for
more information.AUTOMATIC LIGHT CONTROL ONThis message displays when the automatic headlamps
are turned on. SeeExterior Lamps on page 4-9for
more information.
BATTERY SAVER ACTIVEThis message displays when the system detects that
the battery voltage is dropping beyond a reasonable
level. The battery saver system starts reducing certain
features of the vehicle that you may be able to notice.
At the point that the features are disabled, this message
is displayed. It means that the vehicle is trying to
save the charge in the battery.
Turn off all unnecessary accessories to allow the battery
to recharge.
The normal battery voltage range is 11.5 to 15.5 volts.CHANGE ENGINE OIL SOONThis message displays when service is required for the
vehicle. See your dealer/retailer. SeeEngine Oil on
page 6-15andScheduled Maintenance on page 7-3
for more information.
Acknowledging the CHANGE ENGINE OIL SOON
message will not reset the OIL LIFE REMAINING.
That must be done at the OIL LIFE screen under the
vehicle information menu. See “Oil Life” underDIC
Operation and Displays on page 4-37andEngine Oil
Life System on page 6-18.
4-44

ERRORThis message displays while viewing the odometer or
trip odometers if there is a problem with the instrument
panel cluster. See your dealer/retailer for service.FUEL LEVEL LOWThis message displays when your vehicle is low on
fuel. Refill the fuel tank as soon as possible. SeeFuel
Gage on page 4-36andFilling the Tank on page 6-10
for more information.HOOD OPENIf your vehicle has the remote start feature, this
message displays when the hood is not closed
properly. Make sure that the hood is closed completely.
SeeHood Release on page 6-13.ICE POSSIBLE DRIVE WITH CAREThis message displays when the outside air temperature
is cold enough to create icy road conditions. Adjust
your driving accordingly.LEFT REAR DOOR OPENThis message displays when the driver side rear door is
not closed properly. Make sure that the door is closed
completely.
OIL PRESSURE LOW STOP ENGINENotice:If you drive your vehicle while the engine
oil pressure is low, severe engine damage may
occur. If a low oil pressure warning appears on the
Driver Information Center (DIC), stop the vehicle
as soon as possible. Do not drive the vehicle until
the cause of the low oil pressure is corrected.
SeeEngine Oil on page 6-15for more information.
This message displays when the vehicle’s engine
oil pressure is low. The oil pressure light also appears
on the instrument panel cluster. SeeOil Pressure
Light on page 4-34.
Stop the vehicle immediately, as engine damage can
result from driving a vehicle with low oil pressure.
Have the vehicle serviced by your dealer/retailer as
soon as possible when this message is displayed.PASSENGER DOOR OPENThis message displays when the front passenger door
is not closed properly. Make sure that the door is closed
completely.
4-46

Before Leaving on a Long TripTo prepare your vehicle for a long trip, consider having
it serviced by your dealer/retailer before departing.
Things to check on your own include:•
Windshield Washer Fluid:Reservoir full? Windows
clean — inside and outside?
•
Wiper Blades:In good shape?
•
Fuel, Engine Oil, Other Fluids:All levels checked?
•
Lamps:Do they all work and are lenses clean?
•
Tires:Are treads good? Are tires inflated to
recommended pressure?
•
Weather and Maps:Safe to travel? Have
up-to-date maps?
Highway HypnosisAlways be alert and pay attention to your surroundings
while driving. If you become tired or sleepy, find a
safe place to park your vehicle and rest.
Other driving tips include:•
Keep the vehicle well ventilated.
•
Keep interior temperature cool.
•
Keep your eyes moving — scan the road ahead
and to the sides.
•
Check the rearview mirror and vehicle instruments
often.
5-15

A. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 6-33.
B. Battery. SeeBattery on page 6-38.
C. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 6-97.
D. Remote Positive (+) Terminal. SeeJump Starting on
page 6-39.
E. Coolant Recovery Tank. See “Checking Coolant”
underCooling System on page 6-24.
F. Pressure Cap. SeeCooling System on page 6-24.
G. Power Steering Fluid Cap. SeePower Steering Fluid
on page 6-32.
H. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 6-15.
I. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 6-15.
J. Automatic Transmission Fluid Dipstick (Out of View).
See “Checking the Fluid Level” underAutomatic
Transmission Fluid on page 6-22.
K. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 6-35.
L. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 6-19.
Engine OilChecking Engine OilIt is a good idea to check the engine oil level at each
fuel fill. In order to get an accurate reading, the oil must
be warm and the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop.
SeeEngine Compartment Overview on page 6-14
for the location of the engine oil dipstick.
1. Turn off the engine and give the oil several minutes
to drain back into the oil pan. If this is not done, the
oil dipstick might not show the actual level.
2. Pull out the dipstick and clean it with a paper towel
or cloth, then push it back in all the way. Remove it
again, keeping the tip down, and check the level.
6-15

When to Add Engine OilIf the oil is below the cross-hatched area at the tip of the
dipstick, add at least one quart/liter of the recommended
oil. This section explains what kind of oil to use. For
engine oil crankcase capacity, seeCapacities and
Specifications on page 6-100.Notice:Do not add too much oil. If the engine
has so much oil that the oil level gets above the
cross-hatched area that shows the proper operating
range, the engine could be damaged.
SeeEngine Compartment
Overview on page 6-14for
the location of the engine
oil fill cap.
Add enough oil to put the level somewhere in the proper
operating range in the cross-hatched area. Push the
dipstick all the way back in when through. V6 Engine
V8 Engine
6-16

Engine Oil Additives / Engine Oil
FlushesDo not add anything to the oil. The recommended oils
with the starburst symbol that meet GM Standard
GM6094M are all that is needed for good performance
and engine protection.
Engine oil system flushes are not recommended and
could cause engine damage not covered by the vehicle
warranty.Engine Oil Life SystemWhen to Change Engine OilThis vehicle has a computer system that indicates when
to change the engine oil and filter. This is based on
engine revolutions and engine temperature, and not on
mileage. Based on driving conditions, the mileage at
which an oil change is indicated can vary considerably.
For the oil life system to work properly, the system
must be reset every time the oil is changed.When the system has calculated that oil life has been
diminished, it indicates that an oil change is necessary.
A CHANGE ENGINE OIL SOON message comes on.
SeeDIC Warnings and Messages on page 4-44.
Change the oil as soon as possible within the next
600 miles (1 000 km). It is possible that, if driving under
the best conditions, the oil life system might not
indicate that an oil change is necessary for over a year.
However, the engine oil and filter must be changed
at least once a year and at this time the system must
be reset. Your dealer/retailer 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 3,000 miles (5 000 km) since the last oil
change. Remember to reset the oil life system whenever
the oil is changed.
6-18

Automatic Transmission FluidWhen to Check and Change Automatic
Transmission FluidA good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change the fluid and filter at the intervals listed in
Scheduled Maintenance on page 7-3, and be sure to
use the transmission fluid listed inRecommended Fluids
and Lubricants on page 7-10.How to Check Automatic Transmission
FluidBecause this operation can be a little difficult, you may
choose to have this done at the dealer/retailer service
department.
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading on the dipstick.Notice:Too much or too little fluid can damage
your transmission. Too much can mean that some
of the fluid could come out and fall on hot engine
parts or exhaust system parts, starting a fire.
Too little fluid could cause the transmission to
overheat. Be sure to get an accurate reading if you
check your transmission fluid.
Wait at least 30 minutes before checking the
transmission fluid level if you have been driving:
•
When outside temperatures are above 32°C (90°F).
•
At high speed for quite a while.
•
In heavy traffic — especially in hot weather.
•
While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which is 82°C to 93°C
(180°F to 200°F).
Get the vehicle warmed up by driving about 24 km
(15 miles) when outside temperatures are above 10°C
(50°F). If it is colder than 10°C (50°F), you may have to
drive longer.
6-22

Checking CoolantThe vehicle must be on a level surface when checking
the coolant level.
Check to see if coolant is visible in the coolant recovery
tank. If the coolant inside the coolant recovery tank
is boiling, do not do anything else until it cools down.
If coolant is visible but the coolant level is not at or above
the COLD FILL line, add a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant at the coolant
recovery tank, but be sure the cooling system is cool
before this is done. See Engine Coolant Engine Coolant
for more information.
If your vehicle has one of the V6 engines, the coolant
recovery tank is located in the rear of the engine
compartment on the passenger’s side of the vehicle.
If your vehicle has the 5.3L V8 engine, the coolant
recovery tank is located in the rear of the engine
compartment on the driver’s side of the vehicle.
SeeEngine Compartment Overview on page 6-14.
When the engine is cold, the coolant level should be at
or above the COLD FILL line on the coolant recovery
tank. To check the coolant level, look for the COLD FILL
line on the side of the coolant recovery tank that
faces the engine. If the level is not correct, there may
be a leak in the cooling system.
How to Add Coolant to the
Recovery Tank
{
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 specific coolant fill
procedure. Failure to follow this procedure could
cause the engine to overheat and be severely
damaged.
If coolant is needed, add the proper DEX-COOL
®
coolant mixture at the coolant recovery tank.
When the coolant level in the coolant recovery tank is at
the COLD FILL line, start the vehicle.
If the overheat warning continues, there is one more
thing you can try. You can add the proper coolant
mixture directly to the cooling system through the
coolant fill neck on the engine, but be sure the system
is cool before you do it.
6-27