Kelly Dahl Wallander,
I'm sorry to hear of the inconvenience with your radio on your Traverse. Do the chimes come on when you open the door? If they don't, it may be an ignition switch issue. If they do, it may be a door switch issue. These are just suggestions, it is not a diagnosis.
I encourage you to take the vehicle in for an inspection. A certified technician will be able to offer a more accurate diagnosis.
Please keep us posted.
If you have additional questions, please feel free to contact me.
GM Customer Service