The other day, I swapped out the interior lights in my Trailblazer while the lights were turned on and popped the fuse for them during the process. Trying to find this fuse using the diagram on the fuse box cover or in the owners manual was like trying to find a misprint in a book written in a language that I don't speak. So here's the fuse, where it is, how to test it, and now I'm left wondering why the map lights still worked....