Ahmed,

Your first post did state: "I have a '55 1st Series GMC 3/4 Ton 5 window 4x4 Truck."

The photos you posted are of a Chevrolet truck. It has:
- 47-53-style grill
- 47-53-style pickup bed
- 47-53 windshield
- 51-53 doors (also used in 54/55)
The truck has a lot of custom trim and custom add-ons.
It is a beautiful truck.

Is it a 4x4 (four- wheel drive)?

The metal ID tag in your last post is for a GMC truck. I do not know what the "8100" refers to.

That is a very impressive tag. Maybe someone recognizes it - it does not look the 54/55 GMC tags that I have seen.

Maybe someone else has ideas/speculations?