Peterbilt 579 on-highway truck has been updated. The truck pairs either a 2021 Paccar MX-13 or MX-11 engine with a Paccar transmission. A redesigned exterior features a new sloped Metton hood that is narrower and more resistant to damage. Headlights are improved halogen or optional LED. A three-piece bumper integrates the forward radar cover for collision mitigation, with a larger aerodynamic air dam, and provides both protection against damage and lower replacement costs. Optimized aero components include aero mirrors, fairings, side skirts, and closeouts with the revised A-pillar vane redirecting airflow around the windshield, which reduces friction and helps deliver a 10 percent noise reduction in the cabin. A 15-inch digital dash display fully integrates with electrical and safety systems including the Bendix Fusion Advanced Driver Assistance System. It has an integrated camera and radar technology that enable collision mitigation, overspeed alerts, and lane keep assist to be displayed prominently in the center of the display.
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