Partially correct.nothing between 03.5-07, they all had the side marker. but the 99-03 didn't have the side marker. i think the change was to distinguish the 6.0 and the 7.3s. if you want you can get some 08 mirrors which just take some wiring to make work but will bolt right up. ebay would be you best bet for the tow mirrors but you can get the 08's off of dfuser.com and other places.