Something could be made up fairly easily to reflect the air I'm surprised the aftermarket hasn't made a small item that looks like stock and helps redirect the air. I'm also going to Make something and paint to the colour of the dash and somehow make it look discreet.
There are numerous topics on this and even some ways to redirect it already time to take a trip to the hardware store show GM how you make a defrost vent? Lol they can make a great performance car but they know jack about a defrost vent