COMMUNICATION, (ONSTAR, OPT UE1), (C. AVALANCHE 1500 07 Communication; (OnStar, opt UE1), (center dash, behind radio). ESCALADE 07 Communication; (OnStar, opt UE1), (center dash, behind radio). ESCALADE ESV 07 Communication; (OnStar, opt UE1), (center dash, behind radio). ).