GMC Sierra Crankshaft Damper - ATI - 7.425 - Steel - 6 Grv - Ext Bal - 3 Ring - 01–05. Built for 2001–2005 GMC Sierra Duramax LB7 and LLY engines, this steel ATI unit helps control crankshaft torsional vibration and keeps the accessory drive running true.

Engineered around a 7.425-inch steel shell, this damper uses a 3-ring design and external balance to match LB7/LLY requirements. The 6-groove drive supports factory belt layouts, while careful machining supports proper fit and consistent performance under diesel load and rpm. A solid choice for enthusiasts seeking reliable vibration control for towing, tuning, or daily use.

Features

• 7.425 in. steel shell assembly
• 6-groove accessory drive
• External balance for LB7 & LLY (2001–2005)
• 3-ring damper construction
• Designed for GMC Sierra Duramax diesel applications

Have questions about fitment or planning a build? Call us—our team can help and we also offer installation and customization at our Austin, Texas and Los Angeles, California area locations: 512-982-9393 (TX) and 562-981-6800 (CA). If you are considering multiple items, please contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov