2015 Buick Regal GS AWD (Opel Insignia) Start Up, Road Test, and In Depth Review - YouTube
Buick Regal GS Unveiled, Opel Insignia OPC in GM Guise - autoevolution
New Opel Insignia Grand Sport Dresses Up As A Buick Regal | Carscoops
This is a Buick Regal which has been thoroughly converted into an Opel Insignia. Know of any other examples of cars with "foreign appearance" conversions? : r/cars
File:Buick Regal (Opel Insignia).jpg - Wikipedia
Exchange Student on the Honor Roll - 2011 Buick Regal - Review - The New York Times
Buick Regal 2017: So comes the US insignia | CAR ENGINE AND SPORT
New Vauxhall Insignia gives us a sneak peek at Buick's replacement for the Regal - CNET
2008-2013 Buick Regal Opel/Vauxhall Insignia: From Mild to Nearly Wild | Autopolis
Buick Regal - Wikipedia
Opel Insignia breaks cover, and we really hope it's the next-gen Buick Regal