Navistar International Corp (Navistar) is a holding company that operates in the automotive sector. Through subsidiaries and affiliates, the company manufactures commercial and military trucks, diesel engines, and school and commercial buses. The company also offers truck, trailer, and engine service parts for trucks and diesel engines; after-sales service; and retail, wholesale, and lease financing for retail customers and dealers. Navistar markets trucks under the International brand and buses under the IC Bus brand. It has sales outlets and distribution channels in the US, Brazil, Canada and Mexico, and distributors across the world. Navistar is headquartered in Lisle, Illinois, the US.