The 37mm Gun Motor Carriage (GMC) M6 Fargo was an American light anti-tank vehicle developed during World War II. Based on the Dodge WC-52 3/4 ton truck chassis, this makeshift tank destroyer was designed to be a highly mobile platform to carry a 37mm M3 anti-tank gun. It was informally known as "Fargo" due to its Dodge make.

Developed in 1942, the M6 was intended to provide infantry units with enhanced anti-tank capabilities. With a crew of four and equipped with a 37mm gun capable of firing armour-piercing and high-explosive rounds, the M6 was a rapid-response vehicle that could quickly reposition to meet enemy armoured threats. Despite its innovative design, the vehicle had some shortcomings; the open-top and rear design left the crew vulnerable to small arms fire and shrapnel.

Only around 5,380 units were produced before production ceased in 1943, as the vehicle was soon overshadowed by more robust and heavily armoured tank destroyers like the M10 Wolverine. The M6 saw limited combat use, primarily in the Pacific Theater where Japanese armour was generally lighter, making the M6's armament sufficient. After the war, the M6 Fargo did not remain in service, largely due to its limited protection and firepower.