Teft light on in dash

My 97 Malibu has the stock am/fm cassette player. I got sick of having to unlock the thing with a security code anytime I had to disconnect the battery for maintenance purposes. The dealership disabled it for me but now there is a theft system light on in my instrument cluster that won’t go out. I could not find a fuse obviously labeled to pull. Any idea how to get rid of that light?

Thanks!