When the CHANGE ENGINE OIL message 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 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 ten 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 ten months or more since the last service or if the message has not come on at all for one year.
Service | Maintenance I | Maintenance II |
|---|---|---|
Change engine oil and filter. Reset oil life system. See Engine Oil . An Emission Control Service. | · | · |
Allison transmission only: Replace external control-main filter only at the first maintenance service performed on the vehicle. |
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Lubricate chassis components. See footnote #. | · | · |
Lubricate chassis components. See footnote #. | · | · |
Visually check for any leaks or damage. See footnote (j). | · | · |
Inspect engine air cleaner filter change indicator. If necessary, replace filter. See Engine Air Cleaner/Filter . An Emission Control Service. See footnote †. | · | · |
Rotate tires and check inflation pressures and wear. See "Tires" in your owner's manual. | · | · |
Inspect brake system. See footnote (a). | · | · |
Check engine coolant and windshield washer fluid levels and add fluid as needed. | · | · |
Perform any needed additional services. See "Additional Required Services" in this section. | · | · |
Inspect suspension and steering components. See footnote (b). |
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Inspect engine cooling system. See footnote (c). |
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Inspect wiper blades. See footnote (d). |
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Inspect restraint system components. See footnote (e). |
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Lubricate body components. See footnote (f). |
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Check transmission fluid level and add fluid as needed. |
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Replace fuel filter. An Emission Control Service. See footnote †. |
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Inspect shields and underhood insulation. See footnote (h). |
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Check air intake system. See footnote (k). |
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Inspect thermostatically controlled cooling fan (if equipped). See footnote (n). |
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