They are not extra big sellers, kind of neat, but not worth much without ALL the fleet bits. Needs to have all the items already listed, Different front bumper, all gray interior, plain seat (non-pleated vinyl). Cletis link tells it all. Even though the links say 55-59, I believe they were only made in 58-59. Rare does not always mean valuable. Don't think they have any special serial no. Look for all the "tell tales" to be there mentioned here and in links to be sure. You did not say what year. No one would build a clone on purpose but could have used a front clip/fenders that became available. The Chevy "V" cluster with the GMC logo would be a big clue to me. You said a Chevy grille, that's suspicious. The pics you have would be interesting to us. I have only seen the one headlight on an adaptor plate models (58-59). Only other one is that 1957 Special Civil Defence truck over and over again. It is not a Fleet Option, cheapo, bare bones truck. It's a decked-out Blue Chip Napco. That one contradicts what the link says about a "no hole" hood. Can't find another 55-57 GMC Fleet picture in the universe.
