Fluidampr 890101 Diesel Damper for 2001-2005 Chevy/GMC 6.6L Duramax LB7/LLY

Vehicle Fitment

• 2001-2005 Chevrolet / GMC 6.6 L Duramax V8 - LB7 & LLY engines
• Applicable to Silverado 2500HD/3500HD, Sierra 2500HD/3500HD, and other ¾-ton / 1-ton trucks using 6.6 L Duramax

Features

• Viscous damper design - absorbs harmful crankshaft torsional vibrations across full RPM range
• Externally balanced steel damper - ideal for heavy-duty diesel applications
• Precision CNC-machined and computer-balanced components for smooth, reliable operation
• Durable black zinc finish for corrosion resistance and long-term durability
• Engraved timing mark for accurate ignition/timing reference
• SFI 18.1 safety certification - suitable for street, towing, and performance builds
• Maintenance-free operation - no periodic rebuilding or tuning required
• Improves engine longevity by reducing stress on crankshaft, bearings, and internal components under high load or torque

Specifications

• Outside Diameter (OD): 8-3/8"
• Bore Diameter: 1.9300"
• Length / Depth: 2.66"
• Engine Balance: External
• Material: High-grade steel housing
• Finish: Black zinc chromate
• Keyway: Single 5 mm crank keyway
• Weight (total): ~23.9-26.6 lb; Rotating weight: ~17.6-19 lb
• Safety / Compliance: SFI 18.1 certified
• Mounting Hardware: Washer included - Fluidampr bolt kit recommended for best results

Included Components

• 1x Fluidampr 890101 Performance Diesel Damper (externally balanced, steel, black zinc finish)
• 1x Washer (for crankshaft bolt)

Product Description

The Fluidampr 890101 Performance Diesel Damper is engineered for 2001-2005 Chevrolet and GMC trucks equipped with the 6.6 L Duramax LB7 or LLY engines. Using a sealed viscous-damped design, this damper significantly reduces destructive crankshaft torsional vibrations that can damage bearings, crank journals, and timing components - especially under high torque, heavy load, or modified-engine conditions. The external balance and robust steel housing make it ideal for heavy-duty diesel use such as towing, hauling, or performance applications.

Installation is straightforward: the 890101 drops in place of the OEM damper, uses the stock crankshaft keyway, and includes an engraved timing mark for accurate ignition timing reference. With no periodic maintenance or tuning required, this damper is a long-lasting, maintenance-free upgrade that delivers smoother engine operation, enhanced crankshaft stability, and improved longevity - making it a smart choice for anyone upgrading or rebuilding their 6.6 L Duramax-powered truck.