The GM Firebird III was built in 1958 and first shown at Motorama in 1959. It is another extravagant concept with titanium skin, and no fewer than seven short wings and tail fins that were tested extensively in a wind tunnel. It is a two-seater powered by a 225 hp (168 kW) Whirlfire GT-305 gas turbine engine, and a two cylinder 10 hp (7.5 kW) gasoline engine to run all the accessories. Its exterior design features a double bubble canopy, and more technical advancements to make it more practical, such as cruise control, anti-lock brakes, and air conditioning. It also featured "space-age" innovations, such as special air drag brakes, like those found on aircraft, which emerged from flat panels in the bodywork of the car to slow it from high speeds, an "ultra-sonic" key which signaled the doors to open, and an automated guidance system to avoid accidents and "no hold" steering. The steering was controlled by a joystick positioned between the two seats. This gave the car a more futuristic feel and simulated the experience of flying a plane.
- Wheelbase = 119 in (3,023 mm)
- Length = 248.2 in (6,304 mm)
- Height = 44.8 in (1,138 mm) (canopy top)
- Ground clearance = 5.3 in (135 mm)