Here are 10 of GM's finest concept cars, many of which you may never have ... between them and other types of unusual doors. The Impact Experimental debuted at the 1990 LA Motor Show, and was ...

Some even influence the design language of future production models. Here are 10 of GM's finest concept cars, many of which you may never have laid eyes on before. All the concept cars here have ...

While purely a concept at this stage, GM says a production version would likely carry a price tag of around $25,000. That would put the sports car in perfect fighting range with the likes of the ...