Hi my 2007 Hummer H3 horn just stopped working. When I lock the vehicle or press the horn it doesn't work. I checked the fuse and it was fine. Any other suggestions?

 

Welcome.

Avoid duplicate posts/new threads in different sections. This is not your personal hurry up and fix my horn site.

The starting point would be in the owner's manual for your truck, check the horn fuse, check the horn wire. This is an excellent opportunity to get a real horn that people can hear rather than that ridiculous OEM crap.