Sinister Diesel Welded Water Pump for 2001–2005 Duramax 6.6L LB7/LLY

Refresh your Duramax cooling system with the Sinister Diesel Welded Water Pump for 2001–2005 Chevy/GMC 2500 and 3500 trucks equipped with the 6.6L LB7 or LLY diesel engine.

Designed as a drop-in replacement for the factory water pump, this updated design uses precision TIG welds to secure the impeller and pump gear to the shaft. The welded construction helps resist slipping under load, making it an option for routine replacement or modified-engine applications.

Key features

• Precision TIG-welded impeller and pump gear connections to the shaft.
• Drop-in replacement for the factory LB7/LLY water pump.
• Suitable for cooling-system maintenance and modified-engine applications.

Vehicle fitment

• 2001–2005 Chevy/GMC 2500 and 3500.
• 6.6L Duramax LB7 or LLY diesel engine.

Confirm your engine application before ordering.

What's included

• 1 Sinister Diesel welded water pump.
• O-ring.
• Thermostat gasket.

Part number: SD-WWP-01.