Part Type: A/C Accumulator. 1980 Buick Regal Except Tube;. 1981 Buick Regal Engine: 3.8L V6 GAS; EngineVIN: 3; FuelSystem: CARB; 4BBL; Except Tube;. 1983 Buick Regal Submodel: Base; Engine: 3.8L V6 GAS Naturally Aspirated; EngineCode: LD5; EngineVIN: A; FuelSystem: CARB; 2BBL; Except Tube;.