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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).
This vehicle's engine was filled at the factory with a
Mobil 1
®synthetic oil meeting all requirements for this
vehicle.
Substitute Engine Oil: When adding oil to maintain
engine oil level, oil meeting GM Standard GM4718M
might not be available. You can add substitute oil
designated SAE 5W-30 with the starburst symbol at all
temperatures. Substitute oil not meeting GM Standard
GM4718M should not be used for an oil change.
Engine Oil Additives / Engine Oil
Flushes
Do not add anything to the oil. The recommended
oils with the starburst symbol that meet GM Standard
GM4718M 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 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.
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Z06, ZR1, and Grand Sport models have a
racetrack‐ready dry sump engine lubrication system.
This high‐performance system operates differently
than a standard engine lubrication system and requires
a special procedure when changing the engine oil and
filter. See Engine Oil on page 6‑19.
When the system has calculated that oil life has been
diminished, it indicates that an oil change is necessary.
A CHANGE ENGINE OIL message comes on. 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.
To reset the CHANGE ENGINE OIL message after an
oil change: 1. Press the TRIP button so the OIL LIFE percentage is displayed.
2. Press RESET and hold for two seconds. OIL LIFE REMAINING 100% will appear.
If the CHANGE ENGINE OIL message comes back on
when the vehicle is started, the engine oil life system
has not reset. Repeat the procedure.
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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.
Engine Air Cleaner/Filter
See Engine Compartment Overviewon page 6‑14for
the location of the engine air cleaner/filter.
Notice: If you spray water into the engine air
cleaner/filter intake and water enters the engine
air cleaner/filter housing, you could damage your
vehicle's engine. The repairs would not be covered
by your warranty. Do not spray water into the
engine air cleaner/filter intake and/or housing. If you are cleaning the vehicle with the hood open, take
care not to spray water directly near the filter opening of
the air cleaner, as shown in the illustration, as this could
damage the vehicle's engine.
When to Inspect the Engine Air Cleaner/
Filter
Inspect the air cleaner/filter at the Maintenance
II
intervals and replace them at the first oil change after
each 80 000 km (50,000 mile) interval. See Scheduled
Maintenance
on page 7‑3for more information. If you
are 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.
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To inspect or replace the engine air cleaner/filter: 1. Open the hood. See Hood Release on page 6‑13.
6.2 L V8 Engine LS3 shown, 6.2 L V8 Engine LS9 and
7.0 L V8 Engine LS7 similar
A. Tube
B. Clamp
C. Duct
2. Remove the tube (A) from the air cleaner assembly.
3. Loosen the clamp (B) at the throttle body and remove the duct (C).
6.2 L V8 Engine LS3 shown, 6.2 L V8 Engine LS9 and 7.0 L V8 Engine LS7 similar
A. Mass Air Flow Sensor Connector
B. Connector Lock
4. Remove the connector lock (B) located at the bottom of the mass air flow sensor connector (A).
5. Press on the top and bottom of the mass air flow sensor connector (A) and remove.
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6.2 L V8 Engine LS36.2 L V8 Engine LS9 shown, 7.0 L V8 Engine LS7 similar
6. To access the air filter element, gently pull the air cleaner assembly upward until the fasteners are
released from the retainer pins in the upper
radiator support.
The LS3 engine has three retainer pins and the
LS7 and LS9 engines have two.
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6.2 L V8 Engine LS3 shown, 6.2 L V8 Engine LS9 and 7.0 L V8 Engine LS7 similar
A. Screw
B. Filter Cover
C. Filter
7. To remove the filter from the LS3 and LS7 engines, remove the six screws (A) securing the filter
cover (B) then pull away from to gain access
to the air filter (C).
To remove the filter assembly from the LS9 engine,
remove the six screws securing the filter cover.
The filter cover and the air filter are one piece. 8. Inspect or replace the filter or filter cover assembly.
See Maintenance Replacement Parts
on
page 7‑12.
9. Reverse Steps 2 through 7 to replace the air cleaner/filter cover.
{WARNING:
Operating the engine with the air cleaner/filter off
can cause you or others to be burned. The air
cleaner not only cleans the air; it helps to stop
flames if the engine backfires. Use caution when
working on the engine and do not drive with the
air cleaner/filter off.
Notice: If the air cleaner/filter is off, dirt can easily
get into the engine, which could damage it. Always
have the air cleaner/filter in place when you are
driving.
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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,
see Service Publications Ordering Information
on
page 8‑16.
Notice: Use of the incorrect automatic transmission
fluid may damage the vehicle, and the damages may
not be covered by the vehicle's warranty. Always
use the automatic transmission fluid listed in
Recommended Fluids and Lubricants on page 7‑10. Change the fluid and filter at the intervals listed in
Scheduled Maintenance
on page 7‑3, and be sure
to use the fluid listed in Recommended Fluids and
Lubricants on page 7‑10.
Manual Transmission Fluid
It is not necessary to check the manual 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. See Recommended Fluids and
Lubricants
on page 7‑10for the proper fluid to use.
Hydraulic Clutch
It is not necessary to regularly check clutch fluid unless
you suspect there is a leak in the system. Adding fluid
will not correct a leak. A fluid loss in this system could
indicate a problem. Have the system inspected and
repaired.
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When to Check and What to Use
The hydraulic clutch fluid
reservoir cap has this
symbol on it. See Engine
Compartment Overview
on page 6‑14for
reservoir location.
Refer to the Maintenance Schedule for the proper
fluid to use. See Recommended Fluids and Lubricants
on page 7‑10. The fluid requires changing every
two years. See Scheduled Maintenance on page 7‑3.
How to Check and Add Fluid
Visually check the clutch fluid reservoir to make sure
the fluid level is at the MIN (minimum) line on the side
of the reservoir. The hydraulic clutch fluid system
should be closed and sealed.
Do not remove the cap to check the fluid level or to
top‐off the fluid level. Remove the cap only when
necessary to add the proper fluid until the level
reaches the MIN line.
Cooling System (Engine)
The cooling system allows the engine to maintain the
correct working temperature.
7.0L Engine shown, 6.2L Engine similar
A. Electric Engine Cooling Fan
B. Coolant Surge Tank with Pressure Cap
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