GM has unveiled the Cadillac Ciel Concept at this year’s Pebble Beach Concours d’Elegance. Ciel is a French word for ‘sky’ and if refers to the fact that this car is a 4-door 4-passenger convertible with a wheelbase of 3,175 mm and measuring 5,174 m in length, 1,968 m in width, and 1,270 m in height. 
The Cadillac Ciel Concept features an all-wheel-drive power-train with a longitudinally mounted 3.6-litre V6 mounted at the front. This engine produces 425 HP (317 kW) and 583 Nm (430 lb-ft) of torque and spins the wheels through a a hybrid transmission with low-speed all-electric drive.
The Ciel sits on 22 inch aluminium wheels, and according to GM, its suspension features monotube shock absorbers and a stabilizer both at the front and back. 
The brakes are ventilated and use 6-piston callipers at the front while the solid rear rotors use 4-piston calipers.

Source: GM