Penske Used Trucks Penske Used Trucks, a business unit of Penske Truck Leasing, is a leading seller of high-quality, late-model used commercial trucks to retail, wholesale, used truck dealers, corporate truck fleet buyers, and it also provides online auctions. Penske sells used sleeper and day cab semi-tractors, straight trucks, flatbeds, refrigerated vans, trailers and more. Penske sells top brands of light-duty, medium-duty and heavy-duty commercial vehicles including Ford, GMC, Hino, Isuzu, Freightliner, International, Volvo, and many others.