ACDelco 12588670 GM Original Equipment Timing Chain Damper Kit with Bolt, Retainer, and Spacer Removes excessive slack from the timing chain to help prevent chain rattle and excessive component wear Contains necessary parts to replace your vehicles engine timing damper GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function