I have a 6th gen Monte and there is a button for the fog lights but there are no fog lights. I'm assuming this is because it was in an accident before I bought it but I'm not sure since the bumper is broken anyways. So I was wondering if it was possible to rewire the button to something else like maybe underglow. And if that's not possible I would maybe consider putting in new fog lights when I get a new bumper depending on the price.

 

If you have the button, then you'll have the wiring for the fog lights. Buy replacement fogs/brackets and be sure to get the wiring harnesses/connectors if you need part of them to reconnect to the stock wiring. I had the same thing. Had a switch, an LS bumper cover, and no fogs because of an accident. Get the fogs, you won't regret the look of having four forward lights. Looks more aggressive!