Used Peterbilt 388 Tri Axle Dump Truck for sale. Features: Full Gauges, Dual Exhaust, Dual Air Cleaners, Differential Lock, 20,000 lb. Steerable Lift Axle, 18 ft. Summit Aluminum Dump Body, Power Locks, Power Windows, Power Mirrors, Auto Tarper, and more. Visit Liberty Kenworth and Coopersburg Kenworth to see our HUGE inventory of new and new and used dump trucks, daycabs, sleepers, trailers, and more.