The services shown in this schedule up to 100,000 miles (160 000 km) should be repeated after 100,000 miles (160 000 km) at the same intervals for the life of this vehicle. The services shown at 150,000 miles (240 000 km) should be repeated at the same interval after 150,000 miles (240 000 km) for the life of this vehicle.

See Part B: Owner Checks and Services and Part C: Periodic Maintenance Inspections .

† The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle's useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded.

* If your vehicle has a Driver Information Center (DIC), it also has the GM Oil Life System, a computer system that lets you know when to change the oil and filter. This is based on engine revolutions and engine temperature and not on mileage. Based on driving conditions, the mileage at which an oil change will be indicated can vary considerably. For the oil life system to work properly, you must reset the system every time the oil is changed.

When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE OIL SOON message on the Driver Information Center (DIC) will come on. See DIC Warnings and Messages . Change your oil as soon as possible within the next two times you stop for fuel. See Engine Oil . It is possible that, if you are driving under the best conditions, the oil life system may not indicate that an oil change 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. It is also important to check your oil regularly and keep it at the proper level.

If the system is ever reset accidentally, you must change your oil at 3,000 miles (5 000 km) since your last oil change. Remember to reset the oil life system whenever the oil is changed. See Engine Oil Life System for information on resetting the system.

+ A good time to check your brakes is during tire rotation. See Brake System Inspection .

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Inspect engine air cleaner filter. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter at every engine oil change. See Engine Air Cleaner/Filter for more information.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Inspect engine air cleaner filter. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter at every engine oil change. See Engine Air Cleaner/Filter for more information.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Replace engine air cleaner filter. See Engine Air Cleaner/Filter for more information.

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more of these conditions:

In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher.

In hilly or mountainous terrain.

Uses such as found in taxi, police, or delivery service.

If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (160 000 km).

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Inspect engine air cleaner filter. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter at every engine oil change. See Engine Air Cleaner/Filter for more information.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Inspect engine air cleaner filter. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter at every engine oil change. See Engine Air Cleaner/Filter for more information.

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Replace engine air cleaner filter. See Engine Air Cleaner/Filter for more information.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Vehicles with Driver Information Center (DIC): The Engine Oil Life System will tell you when to change the engine oil and filter. See Engine Oil Life System . An Emission Control Service. (See footnote *)

•	Vehicles without Driver Information Center: Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service.

•	Rotate tires. See Tire Inspection and Rotation for proper rotation pattern and additional information. (See footnote +.)

•	Replace spark plugs. An Emission Control Service.

•	Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more of these conditions:

In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher.

In hilly or mountainous terrain.

Uses such as found in taxi, police, or delivery service.

If you have not used your vehicle under severe service conditions listed previously and, therefore, have not changed your automatic transmission fluid, change both the fluid and filter.

•

Drain, flush, and refill cooling system (or every 60 months since last service, whichever occurs first). This service can be complex; you should have your dealer perform this service. See Engine Coolant for what to use. Inspect hoses. Clean radiator, condenser, pressure cap, and neck. Pressure test the cooling system and pressure cap. An Emission Control Service.

•	Inspect engine accessory drive belt. Visually inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary. An Emission Control Service.