Here's a picture of the sheet in the glovebox... I talked to the Fire Chief that ordered the vehicle originally. He told me that he bought it through a GMC Dealer in Houghton Lake Mich (now out of business). He is looking for pictures to send me. From the factory it had the heavy duty suspension, the larger doors (of course), the topper, exhaust fan and a cargo heater as well as the items listed. He told me that it had a "federal tech." siren. A red bubble light on top and the words "Gerrish township" in peel and stick letters (lol) on the topper. He further told me that the "t" in the VIN stands for "Special Transportation Vehicle"