2021 Peterbilt 389 Factory Ultra Cab. 565HP Cummins X15. 18 Speed Transmission. 46,000LB Full Locking Rears. 14,320LB Steer Axle. Only 436,000 Original Miles. Double Framed. Air Trac Suspension. Disc Brakes. Loaded Interior. Gauge Package. Factory Touchscreen Display. Keyless Entry. Air Slide Fifth Wheel. 11R24.5 Tires. Poly Rear Fenders. Engine Brake. Cruise Control. Dual Stacks. Dual Breathers. Clean Peterbilt 389