According to the Chevrolet Master Parts books the 1937-38 1/2, 3/4, 1 ton trucks rear fenders are the same for all the pickups and panels (54.25 inches long) p/n 594181 left and p/n 594182 right fits GC,GD,GE,HC,HD,HE except cab & chassis models. The 1.5 ton single units (non-dual wheel ) use p/n p/n594576 & 594855 rear fenders models SA & TA. The 1/2, 3/4 & 1 ton cab & chassis models use 594855 & 594855. The 1.5 ton dual wheel trucks use 595101 & 595102 and these fit 1937 to 1940 models SB,SD,TB,TD,VB,VD,,WA,WB. The 1.5 T dual wheel panels used 595467 & 595468.
