2022 Peterbilt 579, PACCAR, MX-13, 455HP, PACCAR 12 Speed Transmission, Sleeper, , , Stock # 1324439 This 2022 Peterbilt 579 Sleeper just came in. This truck has a 455 HP PACCAR MX13 Engine, 380k Miles, 12 Speed Endurant Transmission, 2.79 Ratio, 245in Wheelbase, Low Air Leaf Suspension. Call or come by Rush Truck Center Houston and let one of our sales professionals tell you about this or any of our trucks in inventory as well as the great financing options currently available. Delivery available. Se habla Español.