Buick 2005 Park Avenue Owner's Manual page 348

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 the GM Oil Life System, a computer
system lets you know 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
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 ENGINE OIL SOON message
will come on. 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.
6-14
However, your engine oil and filter 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 5-17 for information on resetting the system.
@ Whenever the tires are rotated, the Check Tire
Pressure System (if equipped) must be reset.
+ A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-24.
7,500 Miles (12 500 km)
Change engine oil and filter (or every 12 months,
whichever occurs first). An Emission Control
Service. (See footnote *.)
Rotate tires. See Tire Inspection and Rotation on
page 5-67 for proper rotation pattern and additional
information. (See footnote @.) (See footnote +.)