Scheduled Maintenance - Cadillac 2005 CTS Owner's Manual

If you want to get service information, see Service
Publications Ordering Information on page 7-12 .
Owner Checks and Services on page 6-9 tells you what
should be checked, when to check it and what you can
easily do to help keep your vehicle in good condition.
The proper replacement parts, fluids and lubricants to
use are listed in Recommended Fluids and Lubricants
on page 6-13 and Normal Maintenance Replacement
Parts on page 6-15 . When your vehicle is serviced,
make sure these are used. All parts should be replaced
and all necessary repairs done before you or anyone
else drives the vehicle. We recommend the use of
genuine GM parts.

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.
6-4
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 5-20 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
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.