We are the Industry Leader in Diesel Remanufacturing. The Seidel Diesel Group was founded in 1981 by Geret Seidel. Current operations are in our state-of-the-art facility in Bolingbrook, IL. Today, the Seidel Diesel Group has over 150 dedicated employees at 12 locations. Our commitment is to provide customers superior quality, service and workmanship which has contributed to our continued growth internationally.