2018-2020 BUICK REGAL COMMUNICATION CONTROL MODULE ONSTAR UE1 84431137
A, COMM CNTL MOD 84431137. REGAL 18 Communication; (OnStar, opt UE1), ID 84431137. SONIC 20 Communication; (OnStar, opt UE1), (center of dash). TRAX 18 Communication; (center of dash). Part Grade Part Detail.