[JaTochNietDan]

pawn Код:

if(strcmp(cmdtext,"/fix",true) == 0)
{
  if(GetPlayerState != PLAYER_STATE_DRIVER) return SendClientMessage(playerid,red,"You need to be driving a vehicle!");
  SetVehicleHealth(GetPlayerVehicleID(playerid),1000);
  SendClientMessage(playerid,COLOR_YELLOW,"Vehicle fixed");
  return 1;
}

There's a simple example for you