Well if its just bolted on it will cost you less then $50( with out brakes) and less then $200 ( with surge brakes) IF you do it your self. If its bolted on its a ez...should take less then a 20 mins w/o brakes and about a hr with brakes.
If its welded on... look to see if you can buy the "guts" of the hitch, or get out the grinder.
There is also a adjustment nut make sure thats not too tight or lose when it son the truck.