What year is my frame?

[KMC3420]

Originally Posted by bruceman1968

Could be a GMC frame from St. Louis, 1968 to 1971 GMC Vins only had 5 digits.
And 1970 is the only year they started with 50001. 68, 69, and 71 started with 10001.
So my best Guess is the frame is a 1970 GMC from St. Louis.

I wondered if that was the case as some threads mentioned GMC frames didn't have partial vins on them. For now this seems like the most logical answer since it doesn't have the partial vin like a chevy. Is there any difference in a 70 gmc and 70 chevy frame?
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