horn does not blow on 2000 gmc safari on 2000 GMC Safari

2000 gmc safari honrn does not blow when i push on the steering wheel

Asked by for the 2000 GMC Safari
here is an online repair manual that is pretty close to what pro shops use:

find the wiring diagram for the horn and begin tracing, be sure that the fuse is good first and foremost, if you need to remove the steering Wheel BE SURE TO DISCONNECT THE BATTERY NEGATIVE CABLE!!! BEFORE DO SO!!! So the Air bag does not go off and REALLY hurt you.