[Funky61]

Welcome Arno!

If that number is stamped on the frame, just below the door area, I believe it is a part number. You would have another on the other side.

My 70 GMC has similar numbers stamped there. Usually on the Chevy trucks, the partial VIN number is stamped next to the Steering box on the frame. Again my 70 does not have one there.

I've been told that the VIN may be stamped on top of the frame, just below the cab/driver seat area. You might be able to see it with a mirror. I've yet to check this out on my suburban.

Here is a photo of those frame numbers I think you refer to; remember this is for a 1970 and these are 'part numbers" for the frame.

Next photo shows the area that might have a partial vin number.

My 73 does have a partial vin stamped on the driver-side upper frame area by the power steering box as mentioned. Hope this helps some.