Launched in 1973, the Buick Regal became a big hit in the 1980s, during the Grand National and GNX era. The nameplate soldiered on for two more generations until it was discontinued in 2004. Upon its return to the U.S. market in 2010, the Regal had become a re-engineered Opel Insignia. Although the "transplant" was received with some criticism by purists, the Regal once again became a big hit, especially in China. For 2018, Buick launched the sixth-generation Regal, a rebadged version of the brand-new Opel Insignia.