Any 12v horn will do it. If you need any further help (pics, etc.), I wrote an instructable on it. Just go to www.instructables.com, and search for Astra, and you should find it.
I plan on putting a second horn with this one. This one will be a hig…
I don't think that they can void your warranty by going over a certain Mile Per Hour. There is nothing in the manual that says anything about that. However, OnStar can track pretty much everything to do with your car. I can't say that I like having…
That is likely because they don't want to get into technical problems over the phone. However, I have had the same problem as you. And like you, I wanted to figure out what I could do to stop the car from sounding like it was attempting to attract a…