thats all youre really going to find out with a 12 digit vin code, other than also the plant it was buuilt at
what else do you need to know ? about it ? the ivn will not tell you axle or tranny or anything like that you need ot find a build sheet and/or SPID lable in the car in order to find out original and optional equipment installed in the car but oen proble, is that cars did not recieve spid labels until 84, trucks got them since 67 however.
gm was horrible and probably the worst about not keeping build info on their vehicles, they did not keep very much at all, its rare to find build info numbers on gm vehicles
good luck
good luck