See also:

Lane Departure Warning (LDW)
The vehicle may have a Lane Departure Warning (LDW) system. Read this entire section before using the system. WARNING: The Lane Departure Warning (LDW) system does not steer the vehicle and is o ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...

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 for wear. See Tire Inspection. ...