2021 PETERBILT 579

The designers and engineers at Peterbilt have created the most technologically sophisticated vehicle the company has ever produced. The 2021 Peterbilt 579 is also the most aerodynamic and fuel-efficient Peterbilt ever, owing to a new external design that includes a new slanted hood and aero components that have been tuned, as well as the new PACCAR MX-13 and MX-11 engines and PACCAR. A 10 percent quieter cab and sleeper, more storage space, a new smart steering wheel, and a better Bluetooth microphone will all contribute to drivers feeling more at ease while on the road.

Performance and Fuel Economy

The MX-11 and MX-13 are two of the most powerful engines available from PACCAR, and both have undergone significant improvements. Both are now EPA 2021 certified, which is wonderful news for anyone who wants to save money on their fuel expenses. With a single integrated solution, the PACCAR Powertrain helps you get the most kilometers out of your vehicle while increasing your cargo capacity. Every component, from the long-lasting PACCAR MX engines to the economical 12-Speed Automated Transmission and the 40K Tandem Axle, is designed to function flawlessly with the others.

Design, Comfort, and Quality

Soft-touch materials are used throughout the inside of the 2021 Peterbilt 579, and the 579 UltraLoft with an integrated sleeper offers 70 cubic feet of room and an eight-foot-high ceiling in the UltraLoft configuration. For small appliances, the cabin has plenty of space. It features an integrated microwave, a 32-inch television, a large walk-in closet with many power outlets, and optional bunk beds with an ingenious fold-away ladder. Many windows let in lots of natural light while also providing extra ventilation. According to the manufacturer, interior illumination, including dome LED lights and three-directional spot/reading lights, provides increased convenience and safety at night. On and off the road, new sound-dampening technology helps to reduce outside noise, making the interior more comfortable. Small details, like a permanent cup holder and the choice of several USB charging connections in the center console, help to make life on the road a little more pleasant for drivers.

Peterbilt recognized that a driver’s time in the cab would consume most of their professional life, even when not driving. As a result, they haven’t skimped on any features to make this a vehicle that people will want to drive for many years to come. The driver-friendly cabin of the 2021 Peterbilt 579 provides all of the conveniences of home and a few extra unique features. A pleasant and handy workplace can be created in the capacious sleepers, which have 8 feet of headroom, 70 cubic feet of storage, and the biggest mattress in the business.

According to Newhouse, the hood is constructed of a more durable Metton material, which makes it more impact resistant and minimizes the possibility of fender damage, hence lowering the total cost of ownership for consumers. In addition to the bumper and lower air dams, aerodynamic modifications have been made to the rear bumper. It also has a three-piece construction with a front radar cover for the collision mitigation system built into the bumper; in addition to the use of a bigger air dam, this aids in the improvement of airflow around the car.

Newhouse claims that the airflow of the truck’s glass has been improved due to the addition of new aerodynamic A-pillar vanes, which divert airflow around the windshield to minimize friction without impairing vision. This also contributes to a 10% reduction in in-cab noise, which improves the driving experience. Improvements were also made to the truck’s aero mirrors, fairings, side skirts, and closeouts to give the tractor a more aerodynamic appearance across the whole tractor.

Safety Features

Advanced Driver Assistance Systems (ADAS) are also fully incorporated into the new digital display, a first for the industry. The collision mitigation, Overspeed warnings, and lane-keep assist are all provided by the integrated camera system and radar technologies, which are all shown in the middle of the digital instrument panel display. Adaptive Cruise Control is also offered to assist with driving speeds, which may enhance fuel economy and driving comfort for the driver.


Engine type:

  • PACCAR MX-13
  • PACCAR MX-11
  • Cummins X15
  • Cummins X12N
2021 Peterbilt 579

2021 PETERBILT 579 Factory Service Manual

These manuals go through every aspect of how the vehicle operates. The vehicle’s purchase price includes the service manual for your 2021 PETERBILT 579.

  • Introduction
  • Safety Restraints
  • Instrumentation
  • Before Driving
  • Starting and Operating
  • Vehicle Maintenance
  • Specifications
  • Capacities
  • Servicing
  • Customer Assistance

The service manuals for the 2021 PETERBILT 579 are vast and cover every aspect of the vehicle’s operation. Your 2021 PETERBILT 579 service manual is included with the vehicle.

2021 PETERBILT 579 — Owner’s Manual

When consumers purchase a 2021 PETERBILT 579, they get an owner’s manual containing all the required information for future maintenance and modifications.

  • Introduction
  • Overview
  • Operation
  • Maintenance
  • Troubleshooting

While this list is thorough, the owner’s manual for the 2021 PETERBILT 579 provides more operational suggestions to enhance the user experience.