2026 Peterbilt 579 T/A Sleeper Truck Tractor

ntroducing the fuel-efficient 579 UltraLoft, featuring impressive specifications: a 24″ air slide fifth wheel, air disc brakes at the front, a 2.79 gear ratio, and Low Air Leaf suspension. It’s powered by a Cummins X15 engine delivering 450HP and 1650 LB-FT of torque, paired with a 12-speed automated transmission. The truck boasts all-aluminum wheels and a generous 240-gallon fuel capacity. Inside, you’ll find an 80″ UltraLoft sleeper with a Premier interior, double bunk, mordura seats, and a refrigerator. The exterior is finished in a striking Desert Turquoise. Drive system includes RPL25 SD DRIVELINE with 1 midship bearing. Engine serial number: 8070629. Fuel type: Diesel. Transmission: Automatic.