2021 Peterbilt 389, Cummins, X15, 500HP, Fuller 18 Speed Transmission, Sleeper, , , Stock # 1226380 This 2021 Peterbilt 389 Sleeper just came in. This truck has a 500 HP Cummins X15 Engine, 340k Miles, 18 Speed Transmission, 3.25 Ratio, 265in 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. 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.