For 1990-2009 cars

## Scheduled Maintenance Except Cadillac

When the change engine oil light/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 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, 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 Life System" in your owner manual for information on the Engine Oil Life System and resetting the system.

When the change engine oil light/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 light/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 light/message comes on 10 months or more since the last service or if the light/message has not come on at all for one year.

#### Scheduled Maintenance Services

Service | Maintenance I | Maintenance II
--- | --- | ---
Change engine oil and filter. See Recommended Fluids and Lubricants. Reset oil life system. See "Engine Oil Life System" in your owner manual. An Emission Control Service. | · | ·
Lubricate chassis components (except Equinox, Torrent, Colorado, Canyon, Trailblazer, Envoy, HHR, Acadia, and Enclave). 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" in your owner manual. See footnote (l). |  | ·
Rotate tires and check inflation pressures and wear. See "Tires" in your owner manual. | · | ·
Inspect brake system. See footnote (a). | · | ·
Check engine coolant and windshield washer fluid levels and add fluid as needed. | · | ·
Silverado/Sierra with Allison Transmission®: Replace external control-main filter at the first maintenance service performed on the vehicle. |  |
Perform any needed additional services. See Additional Required Services. | · | ·
Inspect suspension and steering components. See footnote (b). |  | ·
Inspect engine cooling system. See footnote (c). |  | ·
Inspect wiper blades. See footnote (d). |  | ·
Inspect restraint system components. See footnote (e). |  | ·
Lubricate body components. See footnote (f). |  | ·
Check transmission fluid level and add fluid as needed. |  | ·
Acadia, Enclave, HHR, Equinox, Torrent, Uplander, Montana SV6, Express, and Savana: Inspect throttle system. See footnote (n). |  | ·
HHR, Equinox, Torrent, Uplander and Montana SV6: Replace passenger compartment air filter. See footnote (m). |  | ·
Colorado, Canyon, Tahoe, and Yukon: Check transfer case fluid level and add fluid as needed. |  | ·
Diesel: Replace fuel filter. An Emission Control Service. See footnote †. |  | ·

## Scheduled Maintenance Cadillac

To maintain the ride, handling, and performance of your vehicle, it is important that the first tire rotation service be performed when the vehicle has 5,000 to 8,000 miles (8 000 to 13 000 km). Check tires for inflation pressures and wear. Rotate tires. See "Tires" in your owner manual and "Tire Wear Inspection" in At Least Once a Month.

When the CHANGE ENGINE OIL SOON 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, 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, 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 Life System" in your owner manual for information on the Engine Oil Life System and resetting the system.

When the CHANGE ENGINE OIL SOON message appears, the following services, checks, and inspections are required:

• | Change engine oil and filter. See "Engine Oil" in your owner manual. Reset oil life system. See "Engine Oil Life System" in your owner manual. An Emission Control Service.

• | 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" in your owner manual. See footnote (l).

• | Rotate tires and check inflation pressures and wear. See "Tires" in your owner manual and "Tire Wear Inspection" in At Least Once a Month.

• | 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).

• | Inspect engine cooling system. See footnote (c).

• | Inspect wiper blades. See footnote (d).

• | Inspect restraint system components. See footnote (e).

• | Lubricate body components. See footnote (f).

• | Check transmission fluid level and add fluid as needed.