Cadillac 2005 DeVille - Manual (Page 378)

Scheduled Maintenance
When the CHANGE ENGINE OIL message in the Driver
Information Center (DIC) comes on, it means that
service is required for your vehicle. Have your vehicle
serviced 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 engine oil
life system may not indicate that vehicle service is
necessary for over a year. However, your engine oil and
filter must be changed at least once a year and at
this time the system must be reset. Your GM
Goodwrench dealer has GM-trained service technicians
who will perform this work using genuine GM parts
and reset the system.
If the engine oil life system is ever reset accidentally,
you must service your vehicle within 3,000 miles
(5 000 km) since your last service. Remember to reset
the oil life system whenever the oil is changed. See
Engine Oil Life System on page 5-17 for information on
the Engine Oil Life System and resetting the system.
When the change engine oil message appears, certain
services, checks and inspections are required.
Required services are described in the following for
“Maintenance
I ” and “Maintenance II .” Generally,
it is recommended that your first service be
Maintenance
I , your second service be Maintenance II
and that you alternate Maintenance I and Maintenance II
thereafter. However, in some cases, Maintenance II
may be required more often.
Maintenance I — Use Maintenance I if the change
engine oil message comes on within 10 months since the
vehicle was purchased or Maintenance
II was performed.
Maintenance II — Use Maintenance II if the previous
service performed was Maintenance I . Always use
Maintenance II whenever the message comes on
10 months or more since the last service or if the
message has not come on at all for one year.
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