About the Mack DM685S

The Mack DM685S is a heavy-duty on-highway tractor designed for regional haul and vocational applications. Built for durability and uptime, it pairs robust driveline components with a driver-focused cab and flexible chassis options to suit a variety of trailer configurations. The DM685S is ideal for fleets seeking a dependable platform with straightforward serviceability and strong load-hauling capability.