[Robert1970C20rstbukt]

Neat trucks! If the dust cap on the front hubs is flat, the axle is either a 5,000 or 7,000lb. If the cap sticks out to clear the larger spindle, the axle is a 9,000lb. or greater. The '69 GMC manual I have shows several different ones, up to 16,000lb. capacity. I'll bet that blue truck had the rear axle added later on. There were two 1971 C60's at the junkyard a few years ago that had tag axles and springs added to them. I remember the glovebox door on one still had the sticker and it had a 7,000lb front axle, both had Budd wheels though.