The Converj uses the same electric technology as the Chevrolet Volt, which is capable of travelling around 64 kilometres on plug-in power and is due for production late next year.
It is believed the Converj was the subject of a presentation to GM’s board of directors last week, and was given the green light without a definite production date.
The car was first seen at January’s Detroit Motor Show as a two-door sports coupe with 21-inch wheels at the front, 22s at the rear and adaptive magnetic suspension.
Like the Volt, it was powered by an 111kW electric motor and a 1.4-litre 53kW generator.
GM is still to decide whether the production version of the Converj will use the Volt’s range-extending petrol technology or be a brand new, all-electric performance vehicle.