NYC was late to the game on led, some cop cars got em earlier, but most fire seems to have just got led... Our mod is post-9/11, I had to upgrade most the fire apparatus to include their tributes, dumb luck had it most of our vehicles were either damaged or destroyed that day, nearly all have tribute markings.... Newer toys about 08 on its commonplace to see led now, most of em i did were 02-05 range, easier to find pics of em.
PD and FD got LEDs about the same time, 2003/2004. You didnt see it with FD as much because there vehicle replacement schedule is much different. then PD. FD typically gets 10 to 12 years out of there rigs. In PD if a marked car manages to make it 5 years then thats miraculous. (Unmarked cars are a different story they typically last 6/7 years)