TL*THE CONTACT OWNS A 2009 GMC SIERRA 1500. WHILE DRIVING 25 MPH, THE CONTACT STATED THAT THE LIFTERS INSIDE THE MOTOR MALFUNCTIONED AND CAUSED THE VEHICLE TO MAKE A TICKING AND RATTLING SOUND. OCCASIONALLY, A GRAY CLOUD OF SMOKE WOULD EMIT FROM THE EXHAUST PIPE. THE CONTACT STATED THAT THE NOISE IN THE VEHICLE SOUNDED AS IF THERE WAS NO OIL IN IT. THE FAILURE OCCURRED SEVERAL TIMES. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE CONTACT WAS TOLD THAT THEY WOULD NOT PERFORM ANY REPAIRS UNLESS THE VEHICLE WAS INOPERABLE. THE CURRENT MILEAGE WAS 5,020. THE FAILURE MILEAGE WAS APPROXIMATELY 100.