The GMC Otter Light Reconnaissance Car (LRC) was developed by General Motors Canada to meet the demand for this type of armoured car. The design followed the layout of the British Humber Mark III LRC. The GMC Otter was based on the Chevrolet C15 Canadian Military Pattern truck chassis and used many standard GM components. The armament consisted of a hull-mounted Boys anti-tank rifle and a Bren light machine gun in a small open-topped turret. Although it used a more powerful engine than the Humber, it was larger and heavier (by a ton); overall performance was less than the Humber but still acceptable.
The Otter Light Reconnaissance Car (known officially by the British as “Car, Light Reconnaissance, Canadian GM Mark I”) was a light armoured car produced by Canada during the Second World War for British and Commonwealth Forces.