See also:

Power Assist Steps
The vehicle may have power assist steps. To enable or disable the power assist steps push . The power assist steps automatically extend from beneath the vehicle on the side in which the door ha ...

Problems with Route Guidance
Inappropriate route guidance may occur under one or more of the following conditions: You have not turned onto the road indicated. Route guidance may not be available when using automatic rerout ...

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 ...