- Thoroughly tested for reliable, leak-free performance
- Uniform wall sections and smooth coolant-flow cavities for efficient operation
- Coated seals with a stainless steel spring for durability
- Heat-treated impeller shafts supported by high-quality ball/roller bearings for smooth, reliable operation in virtually all conditions
- GM-recommended replacement part for your GM vehicle’s original factory water pump
ACDelco 251-748 GM Original Equipment Water Pump
