You can replace it by getting a new one, GM part number 10438819. This requires taking out your console because the HUD switch has little tabs on the bottom that need squeezed to get it up through the hole. Then you can just take the new switch, plug it into the wiring harness and snap it back into place, securing the console back in after you're finished and you'll be good to go. The console has four bolts around it and then there are 4 little allen screws inside the console "compartment". After they're all out, you have to pull up and back on the console (hard), it's secured with clips to the body. It should be straightforward from there.