2009 CADILLAC ESCALADE Equipment Problems

MY WIFE WAS GOING TO A DOCTOR'S APPOINTMENT WITH OUR 1 YEAR OLD CHILD. WHEN SHE ARRIVES SHE NOTICED THE POWER-ASSISTED STEP DID NOT UNFOLD WHEN SHE OPENED HER DOOR, AS IT NORMALLY DOES. WHEN SHE RETURNED FROM HER APPOINTMENT AND GOT IN THE CAR IT THE POWER-ASSISTED STEP OPENED NORMALLY. AFTER MAKING HER FIRST TURN OUT OF THE STREET SHE HAD PARKED ON, THE NAVIGATION CD STARTED EJECTING AND INSERTING ITSELF AUTOMATICALLY, ALL OF DOORS WERE LOCKING AND UNLOCKING, THE LIGHTS ON THE INSTRUMENT PANEL AND CENTER CONSOLE WERE FLICKERING, POWER STEERING WAS LOST, AND THE CAR STALLED. SHE MANAGED TO VEER OVER, TURN THE KEY OFF, AND CALLED ME. I TOLD HER TO PUT THE CAR IN PARK AND TRY TO RESTART. IT STARTED FINE AND SHE CAREFULLY DROVE BACK HOME. I DROPPED THE CAR OFF AT MY LOCAL MECHANIC AND THEY STATED THERE WERE MULTIPLE WELL-DOCUMENTED BULLETINS...