3273457|Water Pump for 2005 GMC Sierra 2500 HD 8.1L - WP3181XP28. Replace your original Water Pump with this direct-fit unit for the 2005 GMC Sierra 2500 HD 8.1L. Trusted by mechanics and DIYers alike, it helps maintain optimal engine operation and performance.. 2005 GMC Sierra 2500 HD 8.1L Engine Water Pump - WP3181XP28 Also fits the following vehicles: 2005 Chevrolet Silverado 3500 8.1L Engine Water Pump, 2006 Chevrolet Silverado 3500 8.1L Engine Water Pump, 2001 Chevrolet Suburban 2500 8.1L Engine Water Pump, 2002 Chevrolet Suburban 2500 8.1L Engine Water Pump, 2003 Chevrolet Suburban 2500 8.1L Engine Water Pump, 2004 Chevrolet Suburban 2500 8.1L Engine Water Pump, 2005 Chevrolet Suburban 2500 8.1L Engine Water Pump, 2006 Chevrolet Suburban 2500 8.1L Engine Water Pump, 2001 GMC Sierra 2500 HD 8.1L Engine Water Pump, 2002 GMC Sierra 2500 HD 8.1L Engine Water Pump, 2003 GMC Sierra 2500 HD 8.1L Engine Water Pump, 2004 GMC Sierra 2500 HD 8.1L Engine Water Pump, 2005 GMC Sierra 2500 HD 8.1L Engine Water Pump, 2006 GMC Sierra 2500 HD 8.1L Engine Water Pump, 2001 GMC Sierra 3500 8.1L Engine Water Pump