TL* THE CONTACT OWNS A 2019 CHEVROLET SILVERADO K2500HD. THE CONTACT STATED THAT WHILE DRIVING AT SPEEDS OF APPROXIMATELY 35 MPH OR HIGHER, THEY WOULD NOTICE THAT THE VEHICLE WOULD BEGIN TO EMIT SPARKS FROM THE REAR END. THE FAILURE OCCURRED ON THREE OCCASIONS. THE CONTACT WAS CONCERNED THAT THE FAILURE COULD RESULT INTO A FIRE. THE CONTACT TOOK THE VEHICLE TO THE DEALER (COLONIAL CHEVROLET LOCATED AT 12420 JEFFERSON DAVIS HWY, CHESTER, VA 23831; PHONE NUMBER 804-748-646) WHO WERE UNABLE TO IDENTIFY THE CAUSE OF THE FAILURE. THE FAILURE CONTINUED TO OCCUR. THE CONTACT RETURNED THE VEHICLE TO THE DEALER WHO THEN SPOKE WITH GM AND WAS ADVISED TO PLACE THE VEHICLE INTO REGION MODE AND IF THEY DID NOT NOTICE THE SPARKS THAN THEY WERE ABLE TO RETURN THE VEHICLE TO THE OWNER. THE VEHICLE HAD NOT BEEN REPAIRED. THE CONTACT HAD NOT CONTACTED THE MANUFACTURER. THE APPROXIMATE FAILURE MILEAGE WAS 5,235.