GMC Sierra 2005 Owner's Manual page 529

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.
Change engine oil and filter. See Engine Oil (Gasoline Engine) on page 5-20.
Reset oil life system. See Engine Oil Life System (Gasoline Engine) on
page 5-23. An Emission Control Service.
®
Allison Transmission
maintenance service performed on the vehicle.
Lubricate chassis components. See footnote #.
Visually check for any leaks or damage. See footnote (j).
Inspect engine air cleaner filter or change indicator (if equipped). If necessary,
replace filter. See Engine Air Cleaner/Filter on page 5-25. See footnote (p).
Rotate tires and check inflation pressures and wear. See Tire Inspection and
Rotation on page 5-78 and "Tire Wear Inspection" in At Least Once a Month
on page 6-11.
Scheduled Maintenance
Service
only: Replace external control-main filter only at the first
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.
Maintenance I Maintenance II
• •
• •
• •
•
• •
6-5