See also:

Safety Locks
Safety Locks Press o to activate the safety locks on the rear doors. The LED (A) comes on when activated. The rear door power windows are also disabled. Press o again to deactivate the ...

Headlamp Delay
Press the customization button until HEADLAMP DELAY: 10 SEC appears in the display. To select your preference for how long the headlamps will stay on when you turn off the vehicle, press the selec ...

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 ...