Specifications:

  • Brand New AC Delco GM Original Equipment Water Pump
  • Direct replacement
  • Built to strict quality control standards
  • No core charge

Note: This pump will fit 99-03 4.8L, 5.3L & 6.0L engines that have the revised (48mm / 1.88") thermostat housing.  If your vehicle was equipped with the 51mm / 2.02" thermostat, you will need replacement housing 12600172.

Your water pump is a major component of your engine cooling system. If the water pump fails, the engine will overheat causing it to shut down. Water pumps have an indicator that tells you when they are going bad. There is a small hole in the water pump right under the shaft in the middle that the pulley bolts to. As the water pump's bearings wear out coolant seeps by them and leaks through this hole. If you notice a few drops of coolant under the front of your engine this is an indicator your pump is failing. If a water pump fails it will cause engine overheating, and possibly further engine damage. If you have noticed little drops of coolant under the front of your vehicle then inspect the bottom of the water pump to see if it is dripping out of the indicator hole. If your water pump is the problem, then this part is for you.

Part Details

  • Product Line: GM Original Equipment

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

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Vehicle Fit

Year Make Model Description
2004-2006Buick Rainier Buick Rainier Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006Cadillac Escalade Cadillac Escalade Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006Cadillac Escalade ESV Cadillac Escalade ESV Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Cadillac Escalade EXT Cadillac Escalade EXT Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Chevy Avalanche 1500 Chevy Avalanche 1500 Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006Chevy SSR Chevy SSR Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006Chevy Silverado 1500 Chevy Silverado 1500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Chevy Silverado 1500 Chevy Silverado 1500 Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006Chevy Silverado 1500 Chevy Silverado 1500 Engine Water Pump V8 4.8L GM Original Equipment ACDelco 251-743
2005-2006Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Water Pump GM Original Equipment ACDelco 251-743
2004Chevy Silverado 2500 Chevy Silverado 2500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Chevy Silverado 3500 Chevy Silverado 3500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Chevy Suburban 1500 Chevy Suburban 1500 Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006Chevy Suburban 2500 Chevy Suburban 2500 Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006Chevy Suburban 2500 Chevy Suburban 2500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006Chevy Tahoe Chevy Tahoe Engine Water Pump GM Original Equipment ACDelco 251-743
2003-2005Chevy Trailblazer EXT Chevy Trailblazer EXT Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006GMC Envoy GMC Envoy Denali Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006GMC Envoy XL GMC Envoy XL Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2005GMC Envoy XUV GMC Envoy XUV Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006GMC Savana 1500 Van GMC Savana 1500 Van Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2003-2005GMC Savana 2500 Van GMC Savana 2500 Van Engine Water Pump V8 4.8L GM Original Equipment ACDelco 251-743
2004-2006GMC Savana 2500 Van GMC Savana 2500 Van Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2004-2006GMC Savana 2500 Van GMC Savana 2500 Van Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2003-2005GMC Savana 3500 Van GMC Savana 3500 Van Engine Water Pump V8 4.8L GM Original Equipment ACDelco 251-743
2004-2006GMC Savana 3500 Van GMC Savana 3500 Van Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006GMC Sierra 1500 GMC Sierra 1500 Engine Water Pump V8 4.8L GM Original Equipment ACDelco 251-743
2004-2006GMC Sierra 1500 GMC Sierra 1500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006GMC Sierra 1500 GMC Sierra 1500 Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2005-2006GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Water Pump GM Original Equipment ACDelco 251-743
2004GMC Sierra 2500 GMC Sierra 2500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006GMC Sierra 2500 HD GMC Sierra 2500 HD Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006GMC Sierra 3500 GMC Sierra 3500 Engine Water Pump V8 6.0L GM Original Equipment ACDelco 251-743
2004-2006GMC Yukon GMC Yukon Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006GMC Yukon XL 1500 GMC Yukon XL 1500 Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006Hummer H2 Hummer H2 Engine Water Pump GM Original Equipment ACDelco 251-743
2004-2006Isuzu Ascender Isuzu Ascender Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743
2005-2006Saab 9-7X Saab 9-7X Engine Water Pump V8 5.3L GM Original Equipment ACDelco 251-743

This part replaces:

  • ACDelco 251-743
  • Hollander 324-00851
  • OE # 19256261
Part #: ACEWP00001

Out of Stock

AC DELCO
Brand #: 251-743