No. The dealer has the option to change it. He just didn't want to because of my priority code.
I was thinking about using a camper and boat at the same time, so I thought the extra 600 lbs on the sticker would help. There is ample evidence that the only difference between the 250 and 350 Tremors with high-cap tow package are the sticker, badge, and price. The tow package gives you the extra leaf spring, and the Tremor give you the 350 rear end. Everything else is the same: springs, frame, crossmembers.