Barring any US vehicles being used or borrowed from the Americans, I would say that if any were, they would have been the 3 ton Dodge D60-L trucks. Basically a 4x2 cargo truck. Most of Chrysler production was specialized vehicles such as aircraft refuelers, ambulances, bomb hoisting. Ford and GM were were approached to produce the CMP trucks which were based on British specifications before the war started. Chrysler wasn't. As a result, Chrysler manufactured Modified Conventional Vehicles on the US production standard. They were equipped with specialist bodies especially for Allied air force service.
The only 4x4's I know of are the Dodge D8 which were built on British standards with all of them being shipped to Africa for use in the desert. The second is the Dodge 3/4 APT, the Canadian version of the WC51. It had modifications and only started production in 1945. Quite why is open to question as by 1945 there really was no need for more 3/4 ton trucks.