For Sale: 2021 Peterbilt 579 Sleeper – PACCAR MX-13, Fuel-Efficient, Low Miles This 2021 Peterbilt 579 offers exceptional fuel economy, comfort, and reliability, making it a perfect fit for long-haul operations. Powered by a PACCAR MX-13 engine producing 455 HP and paired with an Eaton Fuller 12-Speed Endurant automated transmission, this truck delivers smooth shifting, strong performance, and low operating costs. The 80-inch sleeper provides ample space for rest and storage, while the AirSlide fifth wheel and 2.64 rear axle ratio enhance versatility and fuel efficiency on the open road. Key Specifications: Engine: PACCAR MX-13 – 455 HP Transmission: Eaton Fuller 12-Speed Endurant Automated GVWR: 52,000 lbs Wheelbase: 228" Sleeper: 80" Sleeper Fifth Wheel: AirSlide Rear Axle Ratio: 2.64 Mileage: 247,395 miles Stock #: 1829685 Low mileage for its year, fleet-maintained, and ready to roll—this 579 is a dependable and comfortable solution for any fleet or owner-operator looking to maximize uptime and profitability. Call today for pricing, availability, and financing options!