How to identify this era
- New sloped hood and grille treatment
- 15-inch digital display
- Smart steering wheel and revised cab interior
What changed
Peterbilt describes a thoroughly redesigned 579 with a sloped hood, optimized aerodynamics, quieter cab/sleeper, smart steering wheel and 15-inch digital display.
Powertrain context
Launch material highlights 2021 PACCAR MX-11/MX-13 and PACCAR transmission context. Other ordered combinations may exist; verify component tags and build records.
Cab and sleeper
Day cab and sleeper options, including UltraLoft configurations, vary by build. Confirm sleeper size, bunk, storage, HVAC and electrical options.
Technology
Digital Vision and advanced driver-assistance systems are availability claims, not proof of installation. Confirm sensors, cameras, display configuration and service history.
Emissions context
Verify the engine and aftertreatment generation, fault history and emissions-system maintenance on the individual truck.
Used-buyer verification checklist
- VIN and Peterbilt build information
- Engine/transmission model and serial
- Digital display, ADAS and camera equipment
- Sleeper and trim specification
- ECM, aftertreatment and maintenance records