The versatility of the new Model 537 and Model 548 is built upon a new customizable chassis and multiplex electrical architecture. The trucks deliver seamless body builder integration, allowing ...

Peterbilt’s flagship Model 579 tractor is available with an ... automated transmissions with PX-9 engines for its Models 548, 537 and 536. “Together, the TX-12 transmissions and PX-9 engine ...

Peterbilt also uses the Cummins X15 in the model 589, which replaced the 389 ... that use both PACCAR and Cummins engines are ...