Claim: The M18 Hellcat was a 39,000 lb (20 short tons; 18 t) American tank destroyer and fastest U.S. armored fighting vehicle  manufactured by Buick Motor Division of General Motors that was used during World War II and the Korean War
Evidence: 39,000 lb (20 short tons; 18 t) The M18 Hellcat (officially designated the 76 mm Gun Motor Carriage M18 or M18 GMC) was an American tank destroyer of World War II, also used in the Korean War. It was the fastest U.S. armored fighting vehicle on the road. Buick Motor Division of General Motors The Hellcat was the most effective U.S. tank destroyer of World War II. The M18 saw service primarily as the turret-less M39 Armored Utility Vehicle which was used as a prime mover, infantry carrier, and ammunition carrier.