The used Harmonic Balancer Crankshaft Pulley for 6.6L Duramax engines in Chevrolet and GMC vehicles from 2006 to 2010 is a high-quality steel product manufactured by General Motors. This direct replacement part includes bolts and is designed to fit seamlessly into the engine. With interchange part numbers like 6.6L Duramax crankshaft pulley and harmonic balancer, as well as OE/OEM part numbers SPN019298 and 97374383, this product ensures a perfect fit and reliable performance. Made in the United States with a new finish, this pulley is a durable and essential component for maintaining the engine's functionality. Any questions please ask. Thanks!