2024 Peterbilt 579 Ultraloft Towing Capacity. This versatile truck is available in five sleeper configurations including 80″, 72″, 58″, 44″, and ultraloft length. The ultraloft sleeper looks sleek, it provides a weight saving of.
5.0% buyer’s premium on this. Peterbilt’s new model 579 truck has undergone a significant redesign, incorporating driver and fleet feedback.