For Sale: 2022 Peterbilt 579 UltraLoft Sleeper – Cummins X15 Power, Premier Interior. Free 3month/25,000 mile warranty. This 2022 Peterbilt 579 UltraLoft delivers top-tier comfort, performance, and fuel efficiency for long-haul operations. Powered by a Cummins X15 engine with 400 HP and paired with a Fuller 12-Speed Endurant automated transmission, this truck offers smooth shifting, excellent pulling power, and proven reliability. The 80-inch UltraLoft sleeper with Premier interior provides exceptional space, storage, and driver amenities—perfect for life on the road. Equipped with a Jost JSK37 fifth wheel, 200-gallon fuel capacity, and 2.79 rear axle ratio, this unit is designed for efficiency on extended runs. Key Specifications: Engine: Cummins X15 – 400 HP Transmission: Fuller 12-Speed Endurant Automated GVWR: 50,000 lbs Wheelbase: 235" Sleeper: 80" UltraLoft with Premier Interior Fifth Wheel: Jost JSK37 Front Axle Weight: 12,500 lbs Rear Axle Ratio: 2.79 Fuel Capacity: 200 Gallons Mileage: 411,892 miles Stock #: 1299225 Fleet-maintained and ready for the road, this truck combines the legendary durability of Peterbilt with the comfort and efficiency modern drivers demand. Contact us today for pricing, availability, and financing options!