1973 1974 1975 1976 Cadillac Water Pump, GM Part Number 3633853 Group 1.069 Fits the Following Cars; 1973 Cars with Single Groove P/S Pulley 1974 1975 1976 ALL. This is a NEW GM Pump. 2 year Warranty. $100.00 Core Charge will be returned when we receive your old pump.