The most technologically advanced, fuel-efficient Peterbilt – ever

The Model 579’s features are the direct result of our customers’ input. We’ve considered the feedback of over 100 user tests and interviews with drivers, techs, and safety and maintenance managers in applications including over-the-road sleepers, LTL day cabs and vocational applications such as tankers and aggregate haulers. 

The results add up to many technological advancements and a distinctively styled, super comfortable, sleeker, more aerodynamically and fuel-efficient Model 579. One that endured million-mile endurance tests and extensive field validation. No wonder it’s the most technologically advanced, fuel-efficient Peterbilt – ever.

Peterbilt Model 579 with Aerodynamic Lines

Carries a heavy payload with a lighter payout at the pump

  • 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, PACCAR MX-11 and PACCAR PX-9 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

Other powertrain highlights include:

  • 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
PACCAR Engine Isolated

Aerodynamics enhance the efficiency

  • The Model 579 offers the most advanced aerodynamic features and packages to improve fuel economy
  • The bold grille and bumper maximize aerodynamic performance, while the lower-sitting front end enhances visibility of the ground in front of the truck
  • The new air dam below the bumper further improves aerodynamics without compromising ground clearance
  • Sculpted mirror heads and arms not only improve aerodynamic efficiency but also allow the driver to see the top of the trailer while backing up
  • The A-pillar fairing directs air across the side of the cab to improve aerodynamics, reduce noise and enhance driver comfort
  • New wheel well closeouts accommodate a wider range of tire options
  • Tip-out chassis fairings provide convenient tool-free access to batteries, fuel tanks, auxiliary power units (APUs) and after-treatment systems
  • The Model 579 features industry-leading Light Emitting Diode (LED) headlamps with superior light coverage, uniformity and a built-in heater for clear lenses in inclement weather
  • An optional LED fog, driving and directional light system enhances visibility in different weather and road conditions by improving high-beam output and automatically activating a cornering light with the turn signal
Peterbilt Model 579 Drives on Highway in Desert

All the comforts of home

  • The interior of the new Model 579 sleeper provides home-like comfort
  • The 80-inch UltraLoft sleeper offers 8 feet of headroom, 70 cu. ft. of storage and the largest mattresses in the industry
  • It can accommodate up to a 32-inch TV and a 1.1 cubic-foot microwave, both the largest in their class
  • In the double bunk configuration, a foldaway ladder conveniently disappears when not in use
  • Sleeper features include sound abatement technology, independent HVAC with separate controls, optional fuel-fired heater and multiple no-idle hoteling options
  • Engine enhancements such as smoother operation, crank-mounted fan, engine-mounted air cleaner and acoustically tuned engine mounts improve the driving experience
  • Trim levels feature dark dash and door pad uppers for reduced glare
  • The spacious interior includes larger panel switches, large cupholders with storage, a new smart steering wheel with audio/phone and cruise controls, SmartNav™ display, dual USB chargers and LED lighting
  • The 15-inch digital display is the largest in the industry, providing easy-to-use features and a configurable interface
  • It integrates Advanced Driver Assistance Systems (ADAS) technology and features, providing critical truck systems information
Peterbilt Model 579 Interior Sleeping Space

579 Resources & Downloads


February 23, 2024

Peterbilt Introduces Model 567 UltraLow Roof Day Cab & Model 589 UltraLow Roof 58-Inch Sleeper for Car Carrier Applications

Peterbilt Introduces Model 567 UltraLow Roof Day Cab & Model 589 UltraLow Roof 58-Inch Sleeper for Car Carrier Applications

February 7, 2024

Peterbilt Recognizes Jackson Group Peterbilt as the North American Dealer Group of the Year

Peterbilt announced Jackson Group Peterbilt (JGP) as the 2023 North American Dealer Group of the Year at its annual Dealer Meeting in Palm Springs, CA.