2020 Peterbilt 389. 525HP Cummins X15. 13 Speed Transmission. 40,000LB Full Locking Rears. Steerable Air Lift Axle. Only 286,000 Original Miles. Air Trac Suspension. Steer Axle Disc Brakes. Loaded Interior. Gauge Package. Air Slide Fifth Wheel. 11R24.5 Tires. Stainless Steel Rear Quarter Fenders. Engine Brake. Cruise Control. Dual Breathers. Clean Peterbilt 389