How to turn off reverse beeping noise

Does anybody know how to turn off the loud beeping noise the truck makes when you put it in reverse? I’m not referring to the sensor that alerts you of an object in your path. It’s the noise the vehicle makes when you put the truck in reverse that does not stop until you take it out of reverse. It’s unbelievably annoying and embarrassing. It sounds like I’m driving a commercial truck for FEDEX. Thanks in advance