The US Army's CCKW 2½-ton truck was the logistical Workhorse of WWII. Over 800,000 vehicles were produced, most of them by the GMC Truck & Coach Division of General Motors Corp (562,750 units). The original GMC 2.5-ton 6x6 was the ACKW(X)-353 six-wheel drive commercial truck (1939-1941).
The GMC 21/2-ton `Duce and a half` truckwas the most common truck in the US Army. It was used throughtout the waron all fronts in transport and supply.