2019 Chevrolet Impala with HFO-1234yf A/C System;. 2018 Chevrolet Impala Engine: 2.5L L4 FLEX; EngineCode: LCV; EngineVIN: A; with HFO-1234yf A/C System;. 2018 Chevrolet Impala Engine: 2.5L L4 GAS; EngineCode: LCV; EngineVIN: A; with HFO-1234yf A/C System;.
