For 1946 PWG = 6400 series, with G indicating July build.
That makes it a 2-ton 160 inch wheelbase.
That info is from the
1946 Chevy Truck Vehicle Information Kit2041 = 2041-1000 = 1941st truck off that assembly line that year.
Tim, Tim, Tim, - Time to go back to math school.

2041-1001 = 1040th truck off the line.
Since they have a month designation in the serial number, would it start over each month??? Did they build 1000+ 2-tons per month back then?