2015 PETERBILT 579 TANDEM AXLE SLEEPER SOLD AS IS UNIT STARTS AND RUNS- IN LEVEL 1 DERATE MODE CUMMINS ISX 15 ENGINE FULLER MANUAL TRANSMISSION CHECK ENGINE LIGHT IS ON ENG HOURS 22,177 FRONT AXLE 13,200 REAR AXLE 38,000 PASSENGER SIDE SEAT MISSING DRIVER SEAT WORN UNIT LOCATED IN KNOXVILLE, TN