Bill & Bill,
That Tech Tip description of the discovery of a code on a frame rail is interesting.
Can you find any indication of a frame-rail ID in any Canadian or USA Chevrolet truck Shop Manual (or in a Specifications Manual provided by the GM Heritage Center)?
The USA Chevrolet Truck Shop Manuals (1957, 1958, and 1960) and the Specifications Manuals both show "door hinge pillar" for 1957 & 1958 trucks; and, in 1960, a vehicle serial number is located on the "upper left hinge pillar" and a vehicle identification plate is located on the "left inner cowl panel" (illustrations are provided for both). No mention of a code on a frame. Is it possible that some states and Canada required a code on a frame, and it was placed on the frame after it left the factory?
