1999-2003 GM 6.5L Engine Water Pump | Alliant Power # AP63561 | OEM Part #'s: 12556231, 88894035, 251-603, 252-776

All Alliant Power water pumps are backed with a 24 month unlimited Mileage warranty. Alliant Power Products are backed by First Class Technical Support. Alliant Power supplies over 200 high demand parts for over 20 different engine applications. Made in the U.S.A. and built to OEM specifications and testing. Authorized Alliant Power Dealer: Diamond Diesel & Turbocharger Service. Quality Replacement for OEM # 12556231