At the 2015 Detroit Auto Show, Buick unveiled a striking concept car called the Avenir.

A large and luxurious sedan, it looked like just the thing to take the General Motors brand out of its decades-long doldrums.

Avenir, which Buick notes is French for future, will be the name of a new sub-brand that will launch during the 2018 model year.

Buick s announcement of the Avenir sub-brand included few details, but it likely features upgraded versions of existing Buick models, distinguished by special styling elements.

Those styling elements will include at least one item cribbed from another Buick concept car, the Avista, a turbocharged rear-wheel drive coupe that debuted at the 2016 Detroit Auto Show earlier this year.

The Avista s grille will serve as one of the guideposts for designers working on Avenir models, according to Buick.

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