See also:

OnStar Personal Identification Number (PIN)
A PIN is needed to access some of the OnStar services, like Remote Door Unlock and Stolen Vehicle Assistance. You will be prompted to change the PIN the first time when speaking with an Advi ...

Underbody Maintenance
Use plain water to flush dirt and debris from the vehicle's underbody. Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop. ...

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. ...