A vehicle includes a shift by wire (SBW) module that allows for electronic shifting between various gears, such as park, neutral, drive, etc. The SBW module includes one or more buttons that enable the shifting between the various gears. When the park gear is selected, a light source illuminates a symbol or a portion of the button associated with placing the vehicle into park. A controller is programmed to darken or dim the light source in response to an operator pressing one of the buttons while the vehicle is in the park gear. For example, when the vehicle is already in park, another depression of the park button can darken or dim the light source associated with the park button.