My new dept has 4 Impalas (07-09, I believe) for patrol and they are lacking in the warning light department. They all have full liberty's with depopulated (4 led) heads but no HLF/TLF. Someone said the dept ordered the cheapest cars they could find and they didn't come with built in flashers, but I thought all police package Impalas came with them. Anyone know which is correct?