radiator leak on 1996 Buick Skylark

6 cyl 3L skylark grand coup. replaced radiator, head gaskets done, rewiring, replaced blower fan fuse with amber 40, replaced relay, hoses replaced, platimum spark plugs and wires, replaced thermostat, replaced heater core. it leaks antifreeze. why?

Asked by for the 1996 Buick Skylark
you need to use a cooling system pressure tester to answer
this question. you may have replaced wiring, spark plugs and relay, but you did not replace the water pump or the radiator hoses or the heater hoses or the heater control valve.