Built on the Corvette platform, GM built the Efijy concept under its Australian brand, Holden. This car takes the 1950s styling already in use in the Chevy HHR and exaggerates it with this dramatic coupe.
GM also had this concept, based on the Chevy HHR, on display. This concept does away with the rear doors, using the rear space for cargo. The side mirrors are simple, mounted off a ball joint, and aren't power adjustable. We were also baffled by the lack of door handles.
The designers went for a very clean interior, and a big, industrial-looking shift knob. The speedometer and tachometer in this concept use a cone shape. The numbers look oddly stretched from the passenger seat but perfectly normal to the driver.