Maintenance Schedule

MAINTENANCE SCHEDULE

Owner Checks and Services

At Each Fuel Stop
Check the engine oil level.

Once a Month
Inspect the tires for wear. Check the tire inflation pressures. We recommend that the tires, including the spare tire, if the vehicle has one, be inspected for signs of wear or damage at least once a month.
Replace the tire if:
The indicators at three or more places around the tire can be seen.
There is cord or fabric showing through the tire's rubber.
The tread or sidewall is cracked, cut, or snagged deep enough to show cord or fabric.
The tire has a bump, bulge, or split.
The tire has a puncture, cut, or other damage that cannot be repaired well because of the size or location of the damage.

Check the windshield washer fluid level.

Every Oil Change
Check restraint system components. Starter Switch Check
Check starter switch. Starter Switch Check
Check automatic transmission shift lock control function. Automatic Transmission Shift Lock Control Function Check
Check ignition transmission lock. Ignition Transmission Lock Check
Check parking brake and automatic transmission park mechanism. Park Brake and P (Park) Mechanism Check

Engine Oil Change
When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter changed within the next 1 000 km/600 mi. If driven under the best conditions, the engine oil life system might not indicate the need for vehicle service for more than a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Reset the oil life system when the oil is changed. Refer to Service Reminder Indicators.

Special Application Services
Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/1,000 mi and 9 700 km/6,000 mi.
Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi.
Have underbody flushing service performed once a year.

Warning: The tank shield protects the fuel tank in a crash and from road hazards. Operation with the shield removed may result in tank damage that could result in a rupture or possible explosion of the tank. You or others could be injured or even killed. If you must remove a tank shield for any reason, e.g., tank inspection or vehicle repair, always reinstall the shield before operating the vehicle.

Warning: Keeping a CNG fuel tank in service after the tank service expiration date is dangerous and is prohibited by federal law. The tank may no longer withstand the CNG fuel system operating pressure. You could be severely injured or killed. Have the tank replaced.

This CNG vehicle is designed for routine maintenance (fluids, filters, etc.) according to the original specifications as provided.

In addition, the CNG system requires the following every 60 000 km (36,000 mi) or 36 months, whichever occurs first:
Visual inspection of the CNG fuel tanks by a CSA International-certified inspector or authorized GM dealer. For more information visit: http://www.csa-international.org Have the CNG fuel system and tanks inspected if the vehicle has been involved in a collision or fire. The fuel tanks must be replaced 15 years after manufacture. The expiration date of the fuel tanks is on a label on the fuel tanks. Do not reuse old fuel tanks.

Replacement of the high pressure CNG filter.