The services shown in this schedule up to 100,000 miles (166 000 km) should be repeated after 100,000 miles (166 000 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.

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

Change engine oil and filter as indicated by the GM Oil Life System (or every 12 months, whichever occurs first). Reset the system.

Your vehicle has a computer system that lets you know when to change the engine 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 ENGINE OIL message will come on. Change your oil as soon as possible within the next two times you stop for fuel. 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. Your dealer has GM-trained service people who will perform this work using genuine GM parts and reset the system.

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 for information on resetting the system.

An Emission Control Service.

Lubricate chassis components with each engine oil and filter change.

Lubricate the front suspension, ball joints, steering linkage, transmission shift linkage, transfer case shift linkage and parking brake cable guides. Ball joints should not be lubricated unless their temperature is 10°F (-12°C) or higher, or they could be damaged.

See the mileage intervals following for additional services that may be performed with an engine oil change and chassis lubrication. After the services are performed, record the date, odometer reading and who performed the service on the maintenance record pages in Part E of this schedule.

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•

Inspect engine air cleaner filter or change indicator (if equipped). If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter or change indicator (if equipped) at every engine oil change. See Engine Air Cleaner/Filter for more information. An Emission Control Service. (See footnote †.)

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Replace fuel filter. An Emission Control Service. (See footnote †.)

•

Replace engine air cleaner filter on vehicles without a restriction indicator. If equipped with a change indicator, inspect the indicator. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect the change indicator (if equipped) at every engine oil change. See Engine Air Cleaner/Filter for more information. An Emission Control Service. (See footnote †.)

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•

Inspect engine air cleaner filter or change indicator (if equipped). If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter or change indicator (if equipped) at every engine oil change. See Engine Air Cleaner/Filter for more information. An Emission Control Service. (See footnote †.)

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

•	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's GVWR is over 8600 lbs or 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.

When doing frequent trailer towing.

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 (166 000 km).

•	Change transfer case fluid.

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Replace fuel filter. An Emission Control Service. (See footnote †.)

•

Replace engine air cleaner filter on vehicles without a restriction indicator. If equipped with a change indicator, inspect the indicator. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect the change indicator (if equipped) at every engine oil change. See Engine Air Cleaner/Filter for more information. An Emission Control Service. (See footnote †.)

•	Inspect Evaporative Control System. Check all fuel and vapor lines and hoses for proper hook-up, routing and condition. Check that the purge valve works properly, if equipped. Replace as needed. An Emission Control Service. (See footnote †.)

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•

Inspect engine air cleaner filter or change indicator (if equipped). If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter or change indicator (if equipped) at every engine oil change. See Engine Air Cleaner/Filter for more information. An Emission Control Service. (See footnote †.)

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

•	Replace fuel filter. An Emission Control Service. (See footnote †.)

•

Replace engine air cleaner filter on vehicles without a restriction indicator. If equipped with a change indicator, inspect the indicator. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect the change indicator (if equipped) at every engine oil change. See Engine Air Cleaner/Filter for more information. An Emission Control Service. (See footnote †.)

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

•	Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking.

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

•	Inspect spark plug wires. An Emission Control Service.

•	Replace spark plugs. An Emission Control Service.

•	Change automatic transmission fluid and filter if the vehicle's GVWR is over 8,600 lbs or 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.

When doing frequent trailer towing.

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.

•	Change transfer case fluid.

•	Except 8.1L V8 Engine: Inspect Positive Crankcase Ventilation (PCV) valve. An Emission Control Service.

•	Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). 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. An Emission Control Service.