For 1954 the restoration pack shows only tube type tires available on 17 inch wheels for a single wheel 1-ton, so I'd conclude they are not original for an AD truck.

But I'd sure not be surprised if somewhere along the line someone upgraded.

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...