SINCE 05/02/2016 I HAVE BEEN DEALING WITH CRAZY ELECTRICAL PROBLEMS. IT STARTED WITH HEAD LIGHTS DIMMING AT RANDOM TIMES. THEN DRIVING DOWN THE ROAD AT 55MPH WITH CRUISE CONTROL ON, ACTIVITE TURN SIGNAL. WHEN TURN SIGNAL IS ACTIVATED THE CRUISE CONTROL WOULD CUT OFF. SIMULATED 4 TIMES TO ENSURE THERE WAS A PROBLEM. CONTINUED DRIVING. AT 30 MPH THE AIR CONDITIONING TURNED OFF, ALL DASHBOARD LIGHTS & RADIO TURNED OFF BUT ENGINE STAYED RUNNING, 45 SECONDS LATER EVERYTHING TURNED BACK ON. AT THIS TIME THE WIFE FREAKED OUT & ASKED TO PARK, SCARED FOR HER SAFETY & MY OWN. PULLED FORWARD TO PARALLEL PARK, WENT TO PUT THE VEHICLE IN REVERSE. BEFORE REVERSE WAS INITIATED THE TRUCK THREW MULTIPLE WARNING LIGHTS (SERVICE STABLITRAK, ASSISTED STEERING, ETC). THE DASHBOARD LIT UP LIKE A CHRISTMAS TREE. THE STEERING WHEEL VIOLENTLY JERKED & LOCKED UP. THEN THE ENGINE CUT OFF. PUT THE TRUCK IN PARK, TURNED KEY & STARTED RIGHT BACK UP WITH NO WARNING LIGHTS, NO LOW VOLTAGE INDICATION AND NO PROBLEMS. GMC DEALERSHIP COULD NOT REPLICATE THE PROBLEM & RETURNED THE VEHICLE TO ME WITHIN 2 DAYS. THIS HAPPENED AGAIN ON 07/05/2016. THIS TIME IT WAS SENT TO CHEVROLET. THEY REPROGRAMMED THE STEERING WHEEL POSITION SENSOR & CHECKED THE SECURITY OF THE WIRE HARNESS. 07/11/2016 THE VEHICLE LOCKED UP & SHUT OFF AGAIN IN A STARBUCKS DRIVE THROUGH. THIS TIME LOCKING MYSELF & MY FAMILY IN THE TRUCK FOR 3 MINUTES. WHEN IGNITION WAS TURNED, TRUCK WOULD NOT START, NO LIGHTS WOULD COME ON EITHER. THE TRUCK ACTE