See also:

Compass Zone
Your dealer/retailer will set the correct zone for your location. If the zone is not set to your location or you drive out of the area, the variance needs to be changed to the appropriate zone. ...

How the System Works
When the vehicle is started, both outside mirror displays will briefly come on to indicate that the system is operating. While driving forward, the left or right side mirror SBZA display w ...

Repair Facility
GM also recommends that you choose a collision repair facility that meets your needs before you ever need collision repairs. Your GM dealer may have a collision repair center with GM-trained techn ...