Peterbilt has unveiled the next generation of its Model 579 truck. Thanks to the new design, Peterbilt touts an up to 7% fuel economy gain on a like-for-like spec basis compared to the current version. Related Articles – Clean Freight Coalition addresses EPA  emissions regulations efforts – Peterbilt celebrates Model 389 production milestone at Denton manufacturing … Continue reading Peterbilt unveils the next generation of its Model 579