Your vehicle may have power running boards.

The power running boards automatically extend from beneath the vehicle on the side in which the door has been opened. Once the door is closed, the running boards will automatically move back under the vehicle after a brief delay. The vehicle must not be moving for the running boards to extend or retract.

The switch used to disable the power running boards is located on the center console below the climate control system.

The running boards cannot be disabled in the extended position.