See also:

Special Application Services
. Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi. - Have underbody flushing service performed once a year. ...

Voice Recognition
The navigation system's voice recognition allows for hands-free operation of the navigation system, audio system, and OnStar (if equipped) features. Voice recognition can be used when the ignit ...

Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not o ...