MEDIUM DUTY - Model 335 Distinctive Styling with Exceptional Value Bring it on. The Peterbilt Model 335 is built to take on the big jobs. That’s why it’s available only as a Class 7 truck or tractor with a GVW up to 33,000 pounds. It can be configured to meet the demands of virtually any work application and spec’d to meet the needs of any owner. The Model 335 earned its durable reputation from features such as the Metton® hood and stainless steel grille for superior protection of the cooling system. Pl us, the sloping aerodynamic hood enhances driver visibility and productivity. The Model 335 delivers a signature combination of comfort, serviceability, visibility and versatility. It’s ideal for truck and tractor applications such as wrecker, tanker, beverage delivery and municipal utilities.