See also:

SBZA Detection Zones
The SBZA sensor covers a zone of approximately one lane over from both sides of the vehicle, 3.5m (11 ft). This zone starts at each side mirror and goes back approximately 5.0m(16 ft). The heigh ...

Passing
More passing distance is needed when towing a trailer. The combination will not accelerate as quickly and is longer so it is necessary to go much farther beyond the passed vehicle before returning ...

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 the v ...