View 18 Photos View 0 Videos 2021 Peterbilt 337 Box Truck - Automatic Contact for price Upgrade your fleet with this versatile 2021 Peterbilt 337, a Class 6 medium duty truck designed for efficiency and reliability. This white conventional standard cab is powered by a PACCAR... ConditionUsedUsage153,393 MilesDuty ClassMedium Duty Box TruckEngine ModelPaccar PX7TransmissionAllison RDS AutomaticRear End4.10 ratioStock Number83880 MLS Number14578422CategoryDelivery / Moving / Straight / Box Trucks Last Updated9/1/2026 LocationWestbrook, ME, US Sold ByFreightliner of Maine (833) 932-___ SHOWNUMBERCall Seller Email Seller Save More Info