GM Service Manual Online
For 1990-2009 cars only

The coolant pump is a centrifugal-type pump that consists of the following components:

    â€¢ An impeller
    â€¢ An impeller driveshaft
    â€¢ A pulley flange
    â€¢ A cast housing

The back side of the drive belt drives the pulley. The pulley attaches to the pump.