TL* THE CONTACT OWNS A 2016 CHEVROLET SILVERADO 1500. WHILE DRIVING 55 MPH OVER A BUMP IN THE ROAD, THE STEERING WHEEL SHOOK. WHEN THE VEHICLE DECELERATED TO 10 MPH, THE SHAKING STOPPED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO BOB HOWARD CHEVROLET (LOCATED AT 13130 BROADWAY EXT, OKLAHOMA CITY, OK 73114, (405) 748-7700) WHERE IT WAS DIAGNOSED THAT THE IDLER ARM AND STEERING GEAR BOX NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 21,000. *LN*JB