OnStar

See also:

Maintenance Schedule
Owner Checks and Services At Each Fuel Stop . Check the engine oil level. See Engine Oil  . Once a Month . Check the tire inflation pressures. See Tire Pressure  . . Inspect the tires f ...

Engine Oil
To ensure proper engine performance and long life, careful attention must be paid to engine oil. Following these simple, but important steps will help protect your investment: - Always use engine ...

What to Use
WARNING! Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids, can boil before the proper coolant mixture will. The coolant warn ...