Chassis Cab Discounts?

For those of you that have purchased a bare chassis cab truck from a commercial dealership...Are there discounts for them like there is for the residential pickups? Do the dealerships haggle at all on the price or is it more what you see is what you pay?

Looking at buying a 2018 GMC 3500 chassis cab with the gas motor. Have never purchased anything on the commercial truck side of the dealership and was wondering how comparable it was.

Thanks!

Chassis Cab Discounts?