The weight of a Peterbilt truck varies depending on the model that is being reviewed. A Peterbilt model 379 heavy-duty truck from 1997 has a gross vehicle weight rating of approximately 46,000 pounds, while the Class 8 Peterbilt 587 weighs approximately 65,000 pounds.
Smaller Peterbilt truck models, such as the model 325 and the model 220, have a gross vehicle weight of anywhere between 19,500 to 33,000 pounds. The model 220 truck is also designed for utility and urban work, such as pick up, delivery and as a street-sweeping vehicle. The larger Peterbilt 587, on the other hand, is designed for cross-country travel and transport.