4x4 frame id

[Tash4]

Trying to id frame number on top of pass side rail is only one I can find. C7F189923. Any help is appreciated .

[b.sharp]

"C" Is for 2wd. "K" is for a factory 4x4.

[Tash4]

I think c is Chevy & f is flint plant but not sure if 7 is 67 or 77.
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[57taskforce]

The partial vin if there should be stamped on top of the drivers frame rail just behind the steering box. Correct me if I'm wrong but, mines a partial vin. only the last 6 or 8 numbers of the vin so you won't see anything that is relevant to 2wdvs4wd unless your vin matches the cab vin, at which point you'll know what the truck was originally.

[Tash4]

Thanks for the reply. I looked in front of gear box, I will look again. Thanks

[57taskforce]

Do you know what year frame you've got? Early GMCs are not as likely to have the vin stamped up by the steering box. Does it have the driver front spring stops or a disk brake front axle?

[Tash4]

no i dont know the year. that is what im trying to find out. it is a rolling frame that im thinking of buying. owner thinks its a 70-72. i think its 73-80.

[57taskforce]

If you can post a pic we can identify it pretty easily on here.

[Tash4]

i dont have a pic . but i think i found it is a 77. it has a th350 tran & np203 case. 67-72 didnt offer 203 t-case that i could find. thanks for your help.

[bruceman1968]

Tash4, Your frame is a 1977.
C7F189923
C, if your frame was a 1967 this C would NOT be here. C is for Chevrolet. Also 67s were stamped on the driver side rail only. 73-80 could be driver or passenger side depending on year or assembly plant.
7 = 1977, if it was a 1987 it would have a H here
F = Flint assembly plant
189923 = Unique ID, Started at 100001

[Tash4]

Thanks bruceman , that confirms what i have found.

[71blksuper4x4]

Also an easy way to tell is that 67-72 shocks mount towards the front of the rear axle. 73+ are stagger mounted.