1676 1988-1996 GM Chevy 6.2L 6.5L 1995-1996 AM General Diesel CCW water pumpThe 1993 mid 1996 engine is often called the 87gpm pump by the diesel enthusiasts and it was paired with a single by pass blocking thermostat. We designed an impeller to outflow the OEM design to help the 6. 2L and 6. 5L diesel run a little cooler under a load and at slower speed. Our impeller has a larger diameter, an increased vane count, a more open eye to permit greater flow, a reduced impeller vane clearance to the casting volute and a ported