The New Model 579 truck is the first major upgrade by Peterbilt since the Model 579 first debuted in 2012.
Test Drive: Peterbilt’s New Model 579 UltraLoft
Peterbilt’s latest iteration of its Model 579 highway tractor isn’t just an upgrade. It may be one of the most important trucks Peterbilt has ever built. Jack Roberts got to drive one before it was officially unveiled.