ACDelco is an American automotive parts brand owned by General Motors (GM). Factory parts for vehicles manufactured by GM are consolidated under the ACDelco brand, which also offers aftermarket parts for non-GM vehicles. Over its long history it has been known by various names such as United Motors Corporation, United Motors Service, and United Delco. The brand "ACDelco" should not be confused with GM's former AC Delco Systems, formed in 1994 from the merger of AC Rochester Division and Delco Remy Division. In 1995 Delphi Automotive Systems absorbed AC Delco Systems.