GM Service Manual Online
For 1990-2009 cars only

When the CHANGE 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.

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 for information on the Engine Oil Life System and resetting the system.

When the CHANGE 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 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.

Scheduled Maintenance

Service

Maintenance I

Maintenance II

Change engine oil and filter. See Engine Oil. Reset oil life system. See Engine Oil Life System. An Emission Control Service.

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Lubricate chassis components. See footnote #.

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Visually check for any leaks or damage. See footnote (k).

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Inspect engine air cleaner filter. If necessary, replace filter. See Engine Air Cleaner/Filter. See footnote (g).

 

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Rotate tires and check inflation pressures and wear. See Tire Inspection and Rotation and "Tire Wear Inspection" in At Least Once a Month.

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Inspect brake system. See footnote (a).

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Check engine coolant and windshield washer fluid levels and add fluid as needed.

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Perform any needed additional services. See "Additional Required Services" in this section.

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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 passenger compartment air filter. See footnote (l).

 

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Inspect throttle system. See footnote (j).

 

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