I have a 2011 chevy 2500 4x4 extended cab duramax in the middle of the front bumper there is a oblong hole behind that hole is transmission cooler or some kind of cooler I have asked chevy service I have looked at other 2500's and I can't find if there is anything that is supposed to protect the fins from rock's and bug's one of the fins is already bent. Is this a design flaw or is something supposed to be there?