The spacious interior provides drivers a comfortable, ergonomic work environment that includes customizable dash panels, deep cup holders, multiple power ports and best in class storage options for personal items. The 2.1 meter meter wide cab can also comfortably accommodate three persons. With the new Model 579, the combination of aerodynamic innovation and powertrain optimization delivers performance and efficiency for the most cost-conscious companies with up to 5% improved fuel economy. Two new EPIQ aero packages as well as a Select Aero Package provide the right combination of fairings, skirts, and closeouts to exceed application-specific aerodynamic requirements.

The all aluminum cab is lightweight and strong and is the heart of the Model 548, with stamped aluminum panels that are corrosion resistant for maximum durability. Hood and chassis components are engineered for added strength.

Powered by quality, the new Paccar TX-8 automatic transmission provides a best in class power to weight ratio and features up to 2.5% fuel savings compared to competitive transmissions. No matter what the job, the Paccar TX-8 delivers excellent performance.

Available with either the PACCAR PX-7 or the PACCAR PX-9, the 548 has the power to get the job done. The 6.7-litre PACCAR PX-7 Engine delivers superior performance, minimizes operational costs, and maximizes uptime for medium-duty customers. The 8.9-litre PACCAR PX-9 Engine has one of the highest power-to-weight ratios in its class (260-380hp), with heavy-duty features like replaceable wet liners, bypass oil filtration and targeted piston-cooling. Available in both medium- and heavy-duty configurations, PACCAR PX Engine options give customers in traditional Class 7, Class 8, or vocational applications outstanding fuel economy, greater reliability, and unsurpassed performance