See also:

Auto Door Unlock
This feature allows you to select whether or not the door(s) will automatically unlock. It also allows you to select which doors and when they will automatically unlock. See Automatic Door Lo ...

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 ...

Programming the Power Windows
Programming the power windows may be necessary if the vehicle's battery has been disconnected or discharged. If the window will not express up after power has been restored and a message is displ ...