Opel used to be owned by GM since 1931. From Wikipedia: "In the 1990s, Opel was considered to be GM's cash cow, with profit margins similar to that of Toyota.

Opel used to be owned by GM since 1931. From Wikipedia: "In the 1990s, Opel was considered to be GM's cash cow, with profit margins similar to that of Toyota. Opel's profit helped to offset GM's losses in North America and to fund GM's expansion into Asia" The GM bankruptcy contributed to Opel downfall. It makes PSA cars because PSA bought them in 2017.