OnStar Turn by Turn
This display is used for the OnStar
Turn by Turn guidance. SeeOnStar
®
System on page 4-42for more
information.
Blank Display
This display shows no information.
Vehicle Information
Menu Items
Press the MENU button on the
turn signal lever until Vehicle
Information Menu is displayed.
Use the thumbwheel to scroll
through the following menu items:
•Unit
•Tire Pressure
•Remaining Oil Life
•Coolant Temp
•Battery Voltage
•Speed WarningUnit
Move the thumbwheel up or down to
switch between US or Metric when
the Unit display is active. Press SET
to confirm the setting. This will
change the displays on the cluster
and DIC to either English (US) or
metric measurements.
Tire Pressure
The display will show a vehicle with
the approximate pressures of all
four tires. Tire pressure is displayed
in either pounds per square
inch (psi) or in kilopascal (kPa).
SeeTire Pressure Monitor System
on page 9-56andTire Pressure
Monitor Operation on page 9-57
for more information.
Remaining Oil Life
This display shows an estimate
of the oil’s remaining useful life.
If Remaining Oil Life 99% is
displayed, that means 99% of
the current oil life remains.When the remaining oil life is low,
the CHANGE ENGINE OIL SOON
message will appear on the
display. SeeEngine Oil Messages
on page 4-32. The oil should
changed as soon as possible.
SeeEngine Oil on page 9-10.
In addition to the engine oil life
system monitoring the oil life,
additional maintenance is
recommended in the Maintenance
Schedule in this manual.
SeeScheduled Maintenance on
page 10-2for more information.
Remember, the Oil Life display
must be reset after each oil change.
It will not reset itself. Also, be
careful not to reset the Oil Life
display accidentally at any time
other than when the oil has
just been changed. It cannot be
reset accurately until the next
oil change. To reset the engine oil
life system press the SET button
while the Oil Life display is active.
SeeEngine Oil Life System on
page 9-13.
Instruments and Controls 4-29
Of course, traction is reduced when
water, snow, ice, gravel, or other
material is on the road. For safety,
slow down and adjust your driving
to these conditions. It is important
to slow down on slippery surfaces
because stopping distance is longer
and vehicle control more limited.
While driving on a surface with
reduced traction, try your best to
avoid sudden steering, acceleration,
or braking, including reducing vehicle
speed by shifting to a lower gear.
Any sudden changes could cause
the tires to slide. You might not
realize the surface is slippery until
the vehicle is skidding. Learn to
recognize warning clues — such as
enough water, ice, or packed snow
on the road to make a mirrored
surface — and slow down when
you have any doubt.
Remember: Any Antilock Brake
System (ABS) helps avoid only
the braking skid.Competitive Driving
Competitive driving may affect the
vehicle warranty. See the warranty
book before using the vehicle for
racing or other competitive driving.
The new vehicle break-in must be
performed before the vehicle is used
for competitive driving. SeeNew
Vehicle Break-In on page 8-16.
Notice:If you use your vehicle
for competitive driving, the engine
may use more oil than it would
with normal use. Low oil levels
can damage the engine. Be sure
to check the oil level often during
competitive driving and keep the
level at or near the upper mark
that shows the proper operating
range on the engine oil dipstick.
For information on how to add oil,
seeEngine Oil on page 9-10.For competitive driving, it is
recommended that the brake fluid be
replaced with a high performance
brake fluid that has a dry boiling point
greater than 279°C (534°F). After
conversion to the high performance
brake fluid, follow the brake fluid
service recommendations outlined
by the fluid manufacturer. Do not
use silicone or DOT-5 brake fluids.
If the vehicle is used for racing,
competitive driving, sustained high
speed, or events that generate
excessive wheel slip, the rear axle
fluid temperatures will be higher
than would occur in normal driving.
We recommend that the rear axle
fluid be drained and refilled with
new fluid after every six hours of
racing or competitive driving.
SeeRecommended Fluids and
Lubricants on page 10-7for what
fluid to use.
Driving and Operating 8-7
Avoid downshifting to brake
or slow the vehicle when the
engine speed will exceed
4000 RPM.
Do not let the engine labor.
Never lug the engine in high
gear at low speeds. With a
manual transmission, shift to
the next lower gear. This rule
applies at all times, not just
during the break-in period.
Do not participate in racing
events, sport driving schools,
or similar activities during this
break-in period.
Check engine oil with every
refueling and add if necessary.
Oil and fuel consumption may
be higher than normal during
the rst 2 414 km/1,500 miles.
To break in new tires, drive at
moderate speeds and avoid
hard cornering for the rst
322 km/200 miles. New tires do
not have maximum traction and
may tend to slip.
New brake linings also need a
break-in period. Avoid making
hard stops during the rst
322 km/200 miles. This is
recommended every time
brake linings are replaced.
Should the vehicle be used for
racing or competitive driving
(after break-in), the rear axle
lubricant must be replaced
beforehand.
Ignition Positions
The ignition switch has four different
positions.
Notice:Using a tool to force the
key to turn in the ignition could
cause damage to the switch or
break the key. Use the correct key,
make sure it is all the way in, and
turn it only with your hand. If the
key cannot be turned by hand,
see your dealer/retailer.
To shift out of P (Park), turn the
ignition to ON/RUN and apply
the brake pedal.
Driving and Operating 8-17
California Fuel
Requirements
If the vehicle is certified to meet
California Emissions Standards, it is
designed to operate on fuels that
meet California specifications.
See the underhood emission control
label. If this fuel is not available in
states adopting California emissions
standards, the vehicle will operate
satisfactorily on fuels meeting federal
specifications, but emission control
system performance might be
affected. The malfunction indicator
lamp could turn on and the vehicle
might fail a smog-check test.
SeeMalfunction Indicator Lamp
on page 4-19. If this occurs, return
to your authorized dealer/retailer for
diagnosis. If it is determined that the
condition is caused by the type of
fuel used, repairs might not be
covered by the vehicle warranty.
Fuels in Foreign
Countries
If you plan on driving in another
country outside the United States
or Canada, the proper fuel might
be hard to find. Never use leaded
gasoline or any other fuel not
recommended in the previous text
on fuel. Costly repairs caused by
use of improper fuel would not be
covered by the vehicle warranty.
To check the fuel availability, ask
an auto club, or contact a major oil
company that does business in the
country where you will be driving.
Fuel Additives
To provide cleaner air, all gasolines
in the United States are now required
to contain additives that help prevent
engine and fuel system deposits
from forming, allowing the emission
control system to work properly.
In most cases, you should not have
to add anything to the fuel. However,
some gasolines contain only theminimum amount of additive
required to meet U.S. Environmental
Protection Agency regulations.
To help keep fuel injectors and
intake valves clean, or if the vehicle
experiences problems due to dirty
injectors or valves, look for gasoline
that is advertised as TOP TIER
Detergent Gasoline. Look for the
TOP TIER label on the fuel pump to
ensure gasoline meets enhanced
detergency standards developed
by the auto companies. A list of
marketers providing TOP TIER
Detergent Gasoline can be found
at www.toptiergas.com.
For customers who do not use
TOP TIER Detergent Gasoline
regularly, one bottle of GM Fuel
System Treatment PLUS, added
to the fuel tank at every engine oil
change, can help clean deposits
from fuel injectors and intake valves.
GM Fuel System Treatment PLUS
is the only gasoline additive
recommended by General Motors.
It is available at your dealer/retailer.
Driving and Operating 8-45
6.2 L V8 Engine Cover
(L99 Engine shown
LS3 similar)
To remove:
1. Remove the engine oil fill
cap (A).
2. Lift the engine cover (B) to
disengage two front attachment
points.
3. Pull engine cover forward to
disengage from horizontal
rear attachments.
4. Reverse Steps 1 through 3 to
reinstall engine cover.
Engine Oil
Checking Engine Oil
It 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 9-6
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.
When to Add Engine Oil
If the oil is below the cross-hatched
area at the tip of the dipstick,
add at least one liter/quart of the
recommended oil. This section
explains what kind of oil to use.
For engine oil crankcase capacity,
seeCapacities and Speci cations
on page 11-2.
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 9-6for the location of the
engine oil fill cap.
Add enough oil to put the level
somewhere in the proper operating
range. Push the dipstick all the
way back in when through.
9-10 Vehicle Care
What Kind of Engine Oil to
Use (V6 Engine)
Look for three things:
•GM6094M
Use only an oil that meets GM
Standard GM6094M.
•SAE 5W-30
SAE 5W-30 is best for the
vehicle. These numbers on an
oil container show its viscosity,
or thickness. Do not use
other viscosity oils such
as SAE 20W-50.
•American Petroleum Institute
(API) starburst symbol
Oils meeting these requirements
should have the starburst symbol
on the container. This symbol
indicates that the oil has been
certified by the American
Petroleum Institute (API).Notice:Use only engine oil
identi ed as meeting GM Standard
GM6094M and showing the
American Petroleum Institute
Certi ed For Gasoline Engines
starburst symbol. Failure to use
the recommended oil can result
in engine damage not covered by
the vehicle warranty.
Cold Temperature Operation
If in an area of extreme cold,
where the temperature falls
below−29°C (−20°F), use either
an SAE 5W-30 synthetic oil or an
SAE 0W-30 engine oil. Both provide
easier cold starting for the engine at
extremely low temperatures. Always
use an oil that meets the required
specification, GM6094M.
Vehicle Care 9-11
Engine Oil Additives / Engine
Oil Flushes
Do 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 System
When to Change Engine Oil
This 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.
SeeEngine Oil Messages on
page 4-32. Change the oil as soon
as possible within the next 1 000 km
(600 miles). 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 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
The Engine Oil Life System
calculates when to change the
engine oil and filter based on vehicle
use. Whenever the oil is changed,
reset the system so it can calculate
when the next oil change is required.
If a situation occurs where the oil is
changed prior to a change engine oil
message being turned on, reset the
system.
After changing the engine oil, reset
the system:
1. Turn the ignition key to ON/RUN
with the engine off.
2. Fully press and release the
accelerator pedal three times
within five seconds.
If the CHANGE ENGINE OIL
SOON message is not on,
the system is reset.
If the CHANGE ENGINE OIL SOON
message comes on again and stays
on for 30 seconds at the next ignition
cycle, it did not reset. The system
needs to be reset again.
Vehicle Care 9-13
What to Do with Used Oil
Used engine oil contains certain
elements that can be unhealthy for
your skin and could even cause
cancer. Do not let used oil stay on
your skin for very long. Clean your
skin and nails with soap and water,
or a good hand cleaner. Wash or
properly dispose of clothing or rags
containing used engine oil. 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/retailer service department
and have it repaired as soon as
possible.
There is a special procedure
for checking and changing the
transmission fluid. Because this
procedure is difficult, you should
have this done at your dealer/
retailer service department.Contact your dealer/retailer 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 inScheduled
Maintenance on page 10-2, and
be sure to use the fluid listed
inRecommended Fluids and
Lubricants on page 10-7.
9-14 Vehicle Care