I lost 300 lbs. of payload in the first hour of ownership.
The payload sticker says payload is 3845 lbs.
I drove directly from the dealer to the scales and the result was 3542 lbs.
So, I think the stated payload doesn't include full tank and a driver.
I don't weigh 303 lbs.
It looks like the payload stated includes some fuel, no driver.
The other thing I discovered looking at the numbers - this truck added more than 1,000 lbs in options.
The options are worth it and the truck still suits my needs so no problems for me.