I bought a 2004 chevy malibu and the horn doesnt work. By the end of the month I need to get one put in for Inspection. How do I get into my steering wheel to change out the horn?

There are three parts, the switch in the steering wheel, generally the center padded switch can be removed with screws that go in through the back, search for chevy horn switch on youtube and most likely you can watch someone do it. sometimes the center horn switch part just snaps out instead of screws.

there is a horn relay stuck in one of the fuse panels. these can be located by looking in your owners manual. there will be a map or legend of what is what, and there is also usually one in the cover of the fuse panel itself. it's a cheap plug-in unit

then you can also find the horn itself which is generally in front of and to the side the radiator, but behind the grill. you can unplug its connector and jumper the battery right to it. if it honks then your problem is the switch or the relay, if it does not honk then you need another horn. these can be had at parts stores and junk yards all over. the nice thing about a junk yard horn is that it will already have the GM mounting bracket on it so you do not have to fabricate anything.