[lavamike]

Where are your brackets? { }

pawn Код:

if(vehicleid == CXN130)
{
  SendClientMessage(playerid, 0xFF0000, "Tail Number C-XN-130");
  SetPlayerColor(playerid, COLOR_GREEN);
}

if(vehicleid == MCK345)
{
  SendClientMessage(playerid, 0xFF0000, "Tail Number M-CK-345");
  SetPlayerColor(playerid, COLOR_RED);
}

Maybe that would make it work?

and what is always red the player icon color or the message

if it's the message they both are "0xFF0000" - i don't know what color that is off the top of my head so.

and if it's the player icon color, show us your #defines for COLOR_GREEN and COLOR_RED