I couldn't find a step by step guide yet (still looking). But I have a couple leads. Does the relay click when you push the horn? Did you try pushing on different spots on the steering wheel? or try pushing it while the wheel is turned at different spots?
I saw a video on youtube of an Alero who'* horn pad inside the wheel went bad, and the horn would randomly go off. That would probably be what the mechanic is talking about.
As I mentioned in my last post, there'* a ring on the column and a pin on the wheel that controls the horn. When the horn is pressed on the wheel, the pin makes contact with the ring. The ring is known to get dirt on it, causing a bad connection. From what I read on a couple other forums, you can take the plastic off of the column, and see the ring to see if it'* dirty.
With a little more digging, I found that removing the multifunction switch (turn signal switch) and cleaning the contacts have solved the problem in a couple cases.
Here'* something to look at and check into. http://www.gaownersclub.com/forum/sh...d.php?t=147019