Unknown U.S. truck bound for Alaska

[sapper740]

While researching the history of the Alcan Highway I came across this picture of a truck being loaded aboard the USS Leonard Wood, ostensibly to be used to build the highway. The tread pattern on the tires looks similar to the Canadian "Chevron" pattern although it appears more aggressive. I've never seen this pattern of tire on an American made vehicle, most had the NDT tread pattern. Further, the paint appears glossy, not the standard olive drab and I don't think it's due to rain as the Longshoremen aren't wearing slickers. I'd appreciate any help in identifying this truck. The building of the Alcan highway has always been of great interest to me as my Grandfather was a Geologist and supplied important info to the Engineers which aided in choosing the route for the highway.