For time and/or mileage intervals of scheduled maintenance items, refer to Maintenance Items .

The following text and illustrations describe the details of the required scheduled maintenance services.

For information on the proper fluids and lubricants to use, refer to Fluid and Lubricant Recommendations .

For the engine oil and filter changing procedure, refer to Engine Oil and Oil Filter Replacement in Engine Mechanical.

For information on the correct engine oil quality and viscosity, refer to the following:

Notice: Use only engine oil with the American Petroleum Institute Certified for Gasoline Engines starburst symbol. Failure to use the recommended oil can result in engine damage not covered by the warranty.

The STARBURST symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry the STARBURST symbol.

Notice: Using oils of any viscosity other than those recommended could result in engine damage. When choosing an oil, consider the range of temperatures the vehicle will be operated in before the next oil change. Then, select the recommended oil viscosity.

SAE 10W-30 is the recommended engine oil viscosity. Engine oil viscosity (thickness) has an effect on the fuel economy and the cold-weather operation (engine starting and oil flow). Lower viscosity engine oils can provide better fuel economy and cold-weather performance. However, higher temperature weather conditions require higher viscosity engine oils for satisfactory lubrication. When the temperature is consistently lower than 16°C (60°F), 5W-30 may be used. SAE 20W-50 or oils of other viscosity rating or quality designations are NOT recommended for use in any GMC vehicle at any time.

Important: When adding to, or changing the engine oil, use ONLY oils of the proper quality.

In countries other than the United States and Canada, it may be difficult to find engine oils that display the API STARBURST symbol certifying the oil is for use in gasoline engines. If you are unable to find engine oils displaying the API STARBURST symbol, use engine oils that meet API Service SJ and/or ACEA A1-96, ACEA A2-96, or ACEA A3-96 requirements as shown in the chart above.

Check the tires for abnormal wear for damage. Rotate the tires to equalize the wear and obtain maximum tire life. Check the wheel alignment if irregular and/ or premature wear exists. Check for damaged tires. Do not include the compact spare tire in the tire rotation. Inspect the brake system while the tires and wheels are removed.

The front brake linings have electronic wear indicators. The electronic wear indicators illuminate the Brake indicator lamp when replacement is needed. Inspect the lining during the tire rotation. The rear brake linings do not have a wear indicator system. Visually inspect the rear brake linings as follows.

Inspect the accessory drive belts for the following:

Replace as needed. (Belts can have many small cracks in individual ribs without affecting the performance.) Refer to Drive Belt Replacement .

Change both the fluid and the filter according to the maintenance schedule intervals. For maintenance schedule information, refer to Maintenance Schedule .

For the fluid and filter changing procedure, refer to Changing Fluid and Oil Filter in Automatic Transmission.

Replace the spark plugs according to the maintenance schedule intervals with the correct type. For maintenance schedule information, refer to Maintenance Schedule .

For information on the correct type of spark plug, refer to Maintenance Items .

Notice: Failure to follow the described timing belt inspection and maintenance may result in a broken timing belt and cause severe engine damage.

Replace the timing belt at 100,000  miles (160 000 km). The J 42069 Timing Belt Alignment Kit special tool must be used to properly install and adjust the belt. If the belt is improperly installed of the belt is improperly adjusted the following will be seriously affected:

Engine damage will occur if the belt fails. Refer to Timing Belt Replacement in Engine Mechanical for belt replacement and adjustment procedures.

For the spark plug replacement procedure, refer to Spark Plug Replacement .

Replace the fuel filter every 160 000 km (100,000 mi ). Refer to In-Line Fuel Filter Replacement for fuel filter replacement procedures.

Notice: When adding coolant, use DEX-COOL® coolant. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner-at 50 000 km (30,000 mi) or 24 months.

This vehicle was manufactured with GM Goodwrench DEX-COOL® (orange colored, silicate free) when coolant is added or when coolant is changed. Refer to Cooling System Draining and Filling in Engine Cooling for draining and refilling procedure. Add two engine coolant supplement pellets (GM P/N 3634621 or equivalent) when refilling the system.

Replace the air cleaner filter according to the maintenance schedule intervals with the correct type. For maintenance schedule information, refer to Maintenance Schedule .

For information on the correct type of air cleaner filter, refer to Maintenance Items .

For the air cleaner filter replacement procedure, refer to Air Cleaner Element Replacement in Engine Controls.

The passenger compartment air filter is located in the air inlet for the heater and air conditioning module, under the passenger side air inlet grille (leaf screen). Refer to Passenger Compartment Air Filter Replacement in HVAC with Automatic A/C.

The vehicle must be level when inspecting fluid level. The vehicle does not have to be supported by the suspension. Remove the inspection plug from the side of the differential to inspect the fluid level. The fluid level should be at the lower edge of the inspecting plug opening. Refer to Fluid and Lubricant Recommendations for proper fluid level if additional fluid is needed.