Scheduled Maintenance - GMC 2009 Yukon XL Owner's Manual

Owner Checks and Services on page 6-9 tells what
should be checked, when to check it, and what
can easily be done to help keep the 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 Maintenance Replacement Parts
on page 6-15. When the 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
parts from your dealer/retailer.

Scheduled Maintenance

When the CHANGE ENGINE OIL SOON message
displays, service is required for the vehicle. Have the
vehicle serviced as soon as possible within the next
600 miles (1 000 km). It is possible that, if driving under
the best conditions, the engine oil life system may not
indicate that vehicle service 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 technicians
who will perform this work using genuine parts and reset
the system.
6-4
If the engine oil life system is ever reset accidentally,
service the vehicle within 3,000 miles (5 000 km)
since the last service. Remember to reset the oil life
system whenever the oil is changed. See Engine Oil Life
System on page 5-18 for information on the Engine
Oil Life System and resetting the system.
When the CHANGE ENGINE OIL SOON 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 the first service be
Maintenance I, the second service be Maintenance II,
and then 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 SOON message displays 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 displays
10 months or more since the last service or if the
message has not come on at all for one year.