2023 Peterbilt 579 - Diesel, 3 Axles, GVWR 52,500, Empty Weight 17,250. TSX X15, 500 HP, Auto Eaton Endurance Transmission, 2:85 Ratio, 240" Wheelbase, Air Ride, A/Slide, disc brakes, P/S, A/C, Jake brake, cruise control, steel frame, radio, tilt & telscopic steering wheel