By any chance, is the information sticker on the door frame filled out on your truck? Mine is blank and you can't even feel any print on it. It's as if it was never filled out.Yeah thats the way all these trucks were sold, as cab and chassis, 2wd only. then they went to upfitters for the rest. Mine was a Verizon bucket truck and has a Verizon RPO when decode the VIN.
Even the rare "factory" quad cab trucks all decode to 2dr trucks. They were also sent out after being built, to get the cabs and the frame under the cab extended.