2025 Peterbilt 579 Base

2025 Peterbilt 579

The Model 579 is the result of extensive customer input and a commitment to technological advancements. Through over 100 user tests and interviews with drivers, technicians, and safety managers, we have created a sleek, comfortable, and fuel-efficient truck that meets the diverse needs of the industry.

This model incorporates Advanced Driver Assistance Systems (ADAS) technology, providing critical truck systems information and enhancing driver safety. The Bendix Fusion system is recently updated to include pedestrian detection, lane-keeping assist, and side object detection, further improving overall safety on the road.

Experience the most advanced, fuel-efficient Peterbilt ever created – the Model 579. With its cutting-edge technology and customer-driven design, this truck sets new standards for safety, comfort, and efficiency.

Features may include:

• The PACCAR powertrain offers an integrated solution for maximizing MPG and payload capacity

• It combines durable PACCAR MX engines and DX-40k tandem drive axles

• The integration of these components allows for effortless pulling, improved efficiency, enhanced fuel economy and increased driver comfort

• The PACCAR MX-13 and PACCAR MX-11 engines utilize a combination of proven technologies and state-of-the-art innovations

• These engines are designed to maximize MPG and achieve the lowest possible fuel consumption, emissions and noise levels

• They incorporate variable speed engine components and optimized combustion

• PACCAR MX engines deliver exceptional reliability and proven performance, whether in linehaul or vocational heavy-duty truck applications

• Gear ratio coverage for slow-speed maneuvering

• High-performance thru-shaft pinion design that transfers full engine power straight to the road

• Fuel system efficiently optimizes combustion and decreases noise

• Broad torque curve that delivers up to 1,850 lb.-ft. and peak torque at low rounds per minute (RPM)

• Long-life maintenance intervals

• The new PACCAR TX-12 PRO automated transmission is designed to be versitile and efficient, while also remaining tough and durable. It is engineered to operate with engines that have up to 1,000 lbs.-ft. of torque and a maximum Gross Combination Weight Rating (GCWR) of 70,000 lbs.

• Dual PTO functionality to power multiple hydraulic devices simultaneously

• New Extreme Duty Clutch for improved low-speed maneuvering with higher loads

• Rock Free Mode helps rock the truck free from mud, sand or snow

• Off-Highway Calibration enables shift points that are tuned for changing off-highway conditions with a bias toward shifting less often

• Secondary Configuration for a tailored driving experience that accounts for toggling between two calibrations for the load or terrain