Its very easy to replace, I ordered a new button from Brentwood. Removed the instrument cluster. (If you have never done this, label every wire you demate, take digital pics, what ever you need to do make sure the same connector goes back to the same terminal, you can mis mate, and the tach wire, which you might not be using right now is hot, and can be mated to other spade terminals, from experience, 15 years ago, I didnt remember the first time I removed the cluster, its not pretty, I dont trust my memory since)

I didnt have to dissasemble anything on the cluster, wiggled the old button out and the new button in. All in less than one hour.