1973 Buick Regal Submodel: Wagon; Engine: 5.7L V8;. 1973 Buick Regal Submodel: Wagon; Engine: 7.5L V8;. Part Type: HVAC Heater Core. 1974 Buick Regal Submodel: Wagon; Engine: 7.5L V8;. Compatible Years: 1973 1974.
74701 4 Seasons HVAC Heater Control Valve-Heater Valve 4 Seasons 74701
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