Dennis, I'm a cop in upstate NY and I've said more than once around here, In ten years i've never had trouble with a person carrying legally.
It is not required in NY to tell an Officer at a traffic stop that you are in possession of a firearm, however, I think it is a good idea to mention it something like this, "Officer, just so you are aware, I have a concealed carry permit and I have a pistol on my person at this time". I certainly cannot speak for all Cops, but those that I work with would not pull you out of the car for saying this. They might ask to hang on to the gun until they are finished with you and will probably ask to see your permit. On the other hand, if you say nothing and say, for instance my partner Officer walks up on the passenger side of the car and see's your gun because the seatbelt pulled up your jacket (or something like that). My partner says "hes got a gun" and suddenly your looking at the muzzle of mine. You'll be dragged out of the car, disarmed and cuffed until we can sort out the details. THEN, I (and I can't speak for all cops...) would pick you up dust you off, explain why I did what I did, and apologize for the inconvenience.
Mentioning it right off sounds a whole lot more pleasant to me. :wink: