2019 Peterbilt 579

The Model 579 UltraLoft offers drivers an integral cab and sleeper design for Peterbilts flagship on-highway Model 579. The configuration delivers a 2-percent aerodynamic improvement to push the limits of efficiency even further while maintaining the styling and bold look of the Model 579. The increase in efficiency and the reduction in overall tractor weight are a testament to the focus on maximizing user experience.

With the 579, the combination of aerodynamic innovation and powertrain optimization delivers confidence and efficiency for the most cost-conscious companies. Designed for the best aerodynamic performance, we used Computational Fluid Dynamics to test, refine and validate. Peterbilt's flexible

Aero Packages provide the right combination of fairings, skirts and closeouts to exceed application-specific aerodynamic requirements. Available in a day cab, or with detachable sleeper, that adds versatility and longevity of a second life for highest resale value.

Peterbilt offers a compressed natural gas (CNG) configuration for the Model 579, providing short and long haul customers with the industry's most innovative, advanced vehicles with state-of-the-art CNG systems. The Cummins Westport ISX12 G engine complies with all EPA 2013 and CARB emission regulations and is available with ratings of 320-400 horsepower and 1,150-1,450 lb. foot of torque. This CNG platform joins Peterbilt's family of alternative fuel vehicles, forming the industry's most comprehensive environmentally responsible lineup.

The Model 579 is built to last. We made the aluminum cab solid and durable, with the highest quality fit and finish. An in-mold process embeds color directly onto the dash for a long-lasting finish that virtually eliminates fading, scratching and peeling. Electrical wiring carriages support wiring and reduce wear and tear, adding to the overall durability of the components.

Featuring an advanced, robust design that improves fuel economy and reduces weight, the new PACCAR 40,000-pound tandem drive axle is standard for Peterbilts Model 579 specd for line-haul applications. The PACCAR axle is rated at 40,000 pounds and has a gross combination weight of 80,000 pounds, making it ideal for line-haul, regional haul and pick-up and delivery applications. It is the lightest weight axle in its class, saving up to 150 pounds.

The PACCAR MX-11 superior power platform has been integrated into Peterbilts best-in-class vehicles to provide customers maximum power and outstanding fuel efficiency. For optimized performance in virtually any application, the MX-11 has an output of up to 430 horsepower and 1,550 lb.-ft of torque. The combination of a Peterbilt truck and MX Engine offers long-term value through technologically advanced designs with lightweight materials that achieve excellent performance and superior fuel economy. The MX-11 provides longer service intervals, increased uptime, lower operating costs and higher resale value.

To ensure the headlamps on the 579 were the best and the brightest, our engineers traveled to 10 countries and logged countless hours of research, testing and improving. The results are headlamps and fog lamps that have the best down-road visibility and coverage in the industry.

Designed for a consistent beam distribution and exceptional overall road coverage, our headlamps deliver a homogenous pattern and less eye fatigue. A large, one-piece windshield aids visibility and standard air-disc brakes significantly reduce stopping distances.