If you are in an area of extreme cold, where the
temperature falls below−20°F (−29°C), it is
recommended that you use either an SAE 5W-30
synthetic oil or an SAE 0W-30 oil. Both will provide
easier cold starting and better protection for your engine
at extremely low temperatures.
Engine Oil Additives
Do not add anything to your oil. The recommended oils
with the starburst symbol that meet GM Standard
GM6094M are all you will need for good performance
and engine protection.
When to Change Engine Oil (Vehicles
Without a Driver Information Center)
If your vehicle does not have a Driver Information
Center (DIC), change the engine oil and lter at the
intervals speci ed in the maintenance schedule. See
Scheduled Maintenance on page 6-4.
If your vehicle has a Driver Information Center, it has
the Engine Oil Life System. SeeEngine Oil Life System
on page 5-16for information on when to change your
engine oil.
Engine Oil Life System
When to Change Engine Oil (Vehicles
With Driver Information Center)
If your vehicle has a Driver Information Center (DIC), it
has the Engine Oil Life System, a computer system
that lets you know when to change the engine oil and
lter. This is based on engine revolutions and engine
temperature, and not on mileage. Based on driving
conditions, the mileage at which an oil change will be
indicated can vary considerably. For the oil life system to
work properly, you must reset the system every time
the oil is changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE OIL SOON message will come
on. SeeDIC Warnings and Messages on page 3-38.
Change the oil as soon as possible within the next
600 miles (1 000 km). It is possible that, if you
are driving under the best conditions, the oil life system
may not indicate that an oil change is necessary for
over a year. However, the engine oil and lter must be
changed at least once a year and at this time the
system must be reset. Your dealer has GM-trained
service people who will perform this work using genuine
GM parts and reset the system. It is also important to
check your oil regularly and keep it at the proper level.
5-16
Footnotes
†The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
*If your vehicle has a Driver Information Center (DIC),
it also has the GM Oil Life System, a computer system
that lets you know when to change the oil and lter. This
is based on engine revolutions and engine temperature
and not on mileage. Based on driving conditions, the
mileage at which an oil change will be indicated can vary
considerably. For the oil life system to work properly, you
must reset the system every time the oil is changed.When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE OIL SOON message on the
Driver Information Center (DIC) will come on. See DIC
Warnings and Messages on page 3-38.Change
your oil as soon as possible within the next two times
you stop for fuel. See Engine Oil on page 5-13.It
is possible that, if you are driving under the best
conditions, the oil life system may not indicate that an
oil change is necessary for over a year. However,
your engine oil and lter must be changed at least once
a year and at this time the system must be reset. It is
also important to check your oil regularly and keep it at
the proper level.
If the system is ever reset accidentally, you must
change your oil at 3,000 miles (5 000 km) since your
last oil change. Remember to reset the oil life system
whenever the oil is changed. See Engine Oil Life System
on page 5-16 for information on resetting the system.
+A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-20.
6-5
