I've had this problem with my horn lately. It doesn't work... at first. You push it and you get nothing. Then you push it again and it works totally normally. Then after a little while, it's the same thing, you push it and nothing the first time. Then push again and it beeps. You can keep beeping great once it starts working, but once you stop it won't go again for a while. It's a very annoying situation when you're trying to beep at dumbasses on the highway.
Is the horn on a Trailblazer the same switch type mechanism as an S10? If so, is it likely just dirty, or could something else be going on?
Is the horn on a Trailblazer the same switch type mechanism as an S10? If so, is it likely just dirty, or could something else be going on?