See also:

Warranty
OnStar equipment may be warranted as part of the new-vehicle limited warranty. The manufacturer of the vehicle furnishes detailed warranty information. ...

SIDE BLIND ZONE ALERT SYSTEM TEMPORARILY UNAVAILABLE
This message indicates that the SBZA system is disabled because the sensor is blocked and cannot detect vehicles in the blind zone. The sensor may be blocked by mud, dirt, snow, ice, or slush ...

Using the System
When the driver shifts the vehicle into R (Reverse), the video image automatically appears on the navigation screen, or on the inside rearview mirror. Once the driver shifts out of R (Revers ...