Need help, steel gauge, thickness of cargo bed floor for Blazer/Jimmy

[Terrysch]

Seriously looking at replacing the cargo bed floor in my Jimmy with a reproduction. Probably from GMCPauls.

The GMC Pauls website list the steel thickness as 18 gauge.
They list the truck bed floor as 16 gauge.

But the original cargo floor on mine really looks like 16 gauge.
Looks like the original cargo floor, not one modified from a truck floor.

What is the original steel gauge, thickness of the cargo floor for the Blazer/Jimmy from the factory