See also:

Auto Reroute
When a destination is set but is off the planned route, the system automatically plans a new route and begins to reroute. The new route is highlighted on the screen. ...

Low Fuel Warning
When the fuel in the vehicle becomes low, a pop-up displays “Fuel is low. Search for nearby Gas station?” 1. Press OK to show a list of nearby gas stations. 2. Press GO next to the desired gas s ...

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 ...