Back up Camera Not Working?

The back up camera on the Suburban stopped working. When the vehicle is placed in "reverse" the radio display is replaced with a dark screen. This happened all at once and prior to this it worked perfectly with a clear image. I suspect it is a wiring issue or the camera itself has failed.
What I need your help with is a wiring diagram for the camera system including the fuse or fuses supplying the system. A "pin out" of the camera electrical connector would be most helpful. I want to make sure I have power to the camera before bringing out the "parts cannon".
Thank you in advance for your reply and for the times you have helped me in the past!