1677 1996-1999 Chevy GMC HUMMER 6.5L Diesel CCW water pump - bolt on pulleyThe 1677 is designed to outperform GM's higher flow rate "130 gpm" pump released in late 1996. GM grew the impeller diameter by 10% to outflow their earlier pump designs versions and utilized a dual thermostat design to increase the flow rate and to prevent pressure surges within the cooling system. Thermostats Our impeller outperforms and outflows to help the 6. 5L diesel run a little cooler under a load. The impeller has an increased vane count, a
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1677 1996-1999 Chevy GMC HUMMER 6.5L Diesel CCW water pump - bolt on pulley