Proper heat management from the cooling system is crucial on modified engines when you want trouble-free and reliable performance. The factory Duramax water pump is known to slip under load and can serious problems and serious repair bills on modified high-horsepower applications. This updated design is a drop-in replacement for the factory water pump and uses precision TIG welds to secure both the impeller and pump gear to the shaft.If your 2001-2005 Duramax powered truck is running a tuner, a bigger turbo, or bigger injectors, or if it's just time for routine maintenance, get peace of mind with the Sinister Diesel Welded Duramax Water Pump., Includes:Sinister Diesel "Welded" Water Pump, O-Ring, Thermostat Gasket.

This Part Fits:

Year	Make	Model	Submodel
2001-2005	Chevrolet	Silverado 2500 HD	Base
2001-2005	Chevrolet	Silverado 2500 HD	LS
2001-2005	Chevrolet	Silverado 2500 HD	LT
2004-2005	Chevrolet	Silverado 2500 HD	WT
2001-2005	Chevrolet	Silverado 3500	Base
2001-2005	Chevrolet	Silverado 3500	LS
2001-2005	Chevrolet	Silverado 3500	LT
2004	Chevrolet	Silverado 3500	WT
2002-2005	GMC	Sierra 2500 HD	Base
2001-2002	GMC	Sierra 2500 HD	SL
2001-2005	GMC	Sierra 2500 HD	SLE
2001-2005	GMC	Sierra 2500 HD	SLT
2003-2005	GMC	Sierra 2500 HD	WT
2002-2005	GMC	Sierra 3500	Base
2001-2002	GMC	Sierra 3500	SL
2001-2005	GMC	Sierra 3500	SLE
2001-2005	GMC	Sierra 3500	SLT
2004-2005	GMC	Sierra 3500	WT