2021 Peterbilt 579, Cummins, X15, 400HP, Fuller 12 Speed Endurant Transmission, Sleeper, , , Stock # 1151054 2021 Peterbilt 579. Cummins X15 400hp, 461,549, Eaton 12 Speed Endurant Transmission. 80" Ultraloft sleeper, double bunk, New Tires! APU! Unit has been serviced, DPF cleaned. Come get it while it's still available! Price does not include state and local taxes; tags; registration or title fees; dealer-imposed fees, including document preparation, processing or servicing fees, or any optional equipment or upfitting work selected by buyer. Valid while supplies last. Images shown may not reflect actual vehicle.