2021 PETERBILT, 579, Heavy Duty Trucks - Sleeper Trucks, CUMMINS X15, AMT, 2021 Peterbilt 579 CUMMINS POWERED X15! Low Miles! 1 Owner, Fleet Maintained Peterbilt! This is a very nice truck! Southern Truck! 450 HP Cummins X15, Eaton Endurant 12 Speed Automatic Transmission! Mid Roof Sleeper! Only 325k miles AND 7k hours! This truck has been serviced and DOT inspected. Call, text or email Steven at (6.1.6.) 6.0.0. - 2.6.8.2., 450 Horse Power, Air Ride Suspension, Wheels, 230 Wheel Base, , Axle, 2.79 Ratio, Mid Roof Sleeper, VIN