TL*THE CONTACT OWNS A 2005 GMC SIERRA 1500. WHILE DRIVING AT AN UNKNOWN SPEED WITH THE HEAT ACTIVATED, THE CONTACT SMELLED SOMETHING BURNING COMING FROM THE BLOWER MOTOR. SOMETIMES, AFTER THE VEHICLE WAS DRIVEN, HE WOULD SMELL FUEL. WHEN MAKING A LEFT OR RIGHT TURN, ONE OF THE REAR TIRES SLIDES AND THE OTHER ONE KEEPS SPINNING. THE CONTACT BELIEVES THAT THE FAILURE WAS CAUSED BY THE REAR DIFFERENTIAL OR THE ABS. THE VEHICLE HAS NOT BEEN DIAGNOSED BY A DEALER OR MECHANIC AT THIS TIME. THE FAILURE MILEAGE WAS 205.