2015 Peterbilt 389. 550HP Cummins ISX15. 18 Speed Transmission. 46,000LB Full Locking Rears. 22,700LB Air Lift Axle. 20,000LB Steer Axle. Only 423,000 Original Miles. Double Framed. Air Trac Suspension. Dual Steering Gearboxes. Loaded Interior. Leather Seats. Gauge Package. Concert Class Stereo. Air Slide Fifth Wheel. 11R24.5 Drives. 315/80R22.5 Steers. Poly Rear Half Fenders. Aluminum Headache Rack. Strobe Lights. Engine Brake. Cruise Control. Dual Stacks. Dual Breathers. Clean Peterbilt 389