Add Military Police Vehicles like the Dodge Ram, Dodge Charger and Ford Explorer (you can add only one of them if you want to). It would be great for people who do Military RP like Military Convoys, wars etc. It will also make the game more realistic. Also, add MP versions for Military Vehicles (most likely to APCs, Jeeps or Humvees).
This might should be on de CC2 vehicle suggestions
One car per suggestion.
Either way the cars themselves very likely have been suggested before, you could post pictures of what you mean to maybe make it different.