2002-2005 GMC Sierra 2500 HD 6.0L V8 CNG. 2002 GMC Sierra 2500 HD 6.0L V8 BI-FUEL. 2001-2006 GMC Sierra 2500 HD 6.0L V8 GAS. Notes: Water Pump (Standard) -- With Thermostat And Housing. Quality-assured with 100 percent leakage and functional tests of seals, bearings, castings and fully assembled water pump.
