Does anyone have a clue as to what causes backup camera, cruise control and brake system to all fail at the same time in a 2011 Chevrolet Z71 2500 HD?

Thank you.

 

the cruise receives brake pedal input position info to disengage. hard to say with vague symptom descriptions.

 

I understand what you are saying. And I have codes, but all the codes are for components which have already been changed out. There are no blown fuses.

The following have been replaced: Brake pedal sensor, Brake Control Module, Back up assist proximity sensors (all 4)

Still getting Codes: P2534-00, B0423-04, P0572-00 but no check engine light.

 

sonar sensors have no interaction with the camera. the fault can only be in the camera, wiring or display screen.
check engine light is only for powertrain faults that affect emissions.
post good descriptions of the symptoms.
ie.
-the back up camera screen goes black when shifted to reverse.
-when i press the brake...the pedal sinks deep to the floor
-the crusie control indication comes on when powered up but the cruise won't engage.