This rear crankshaft seal remover is designed to remove the rear seal on 2001 and newer 6.6L Duramax diesel engines. Its three jaws grab the inner lip of the press-fit seal so it can be pulled safely from the block and crankshaft without damage. • Three jaws designed to grab inner lip of seal • Forcing screw pulls seal from block and crankshaft • Much better option than prying seal, which can damage engine • Services: 2001+ 6.6L Duramax diesel engines • Applications: GM, ISUZU, GMT800 2500HD and 3500HD models • Compare to GM Factory Tool J-44641