In total there were 42 models, 142 different wheelbase lengths and load ratings ranging from 1/2 ton to 90,000 lbs.

The followup to the K, the KB, was introduced in 1947, with the characteristic difference being a widened lower grill appearing like "wings".

They use the larger FAB, Red, or RD series engines depending upon model year.

Heavy duty models (K6 and above) carried over the D-series cab and high crowned fenders.

For the KB-6 and larger trucks, the only external changes were that the Triple Diamond badge was moved to the top of the grille chrome-work, and the model designations were added to the hood-side chrome trim.