I have a 1994 GMC Sierra 1500 and the horn doesn't work, i tried the cab fuse bow but no fuse there, where would the fuse be for the horn if there is one?

unplug horn would easier
copy and paste link for fuse

https://dot.report/vehicle/gmc/suburban-v1500-4wd/1991/fuses

Bulbs or fuses are the first place to start. The next thing I would move onto would be the wiring harness. Clean out the coupler connections and make sure they are seated properly when you put them back. If you use a meter you can tell if you are getting 12 volts through the harness itself.

IS THERE A KEY RELEASE SWITCH OR BUTTON ON THE STEERING WHEEL ANYWHERE IF NOT THE SWITCH ITSELF COULD BE LOCKED UP

Find the horn icon on fuse box,. or owners manual diagram of fuses once you locate the horn fuse pull it out ! The horn will be disabled till you decide otherwise..

Sounds like the horn itself is shorted out. You didn't mention if the blown fuses were a result of using the horn. A horn in construction is an electromagnet acting on a diaphram; if the electromagnet develops a short, it causes an overcurrent condition and will blow the fuse.

Either the horn itself is bad or the horn switch is bad in the steering column. Try running a hot wire straight to the horn to c if it works

check at horn to see if you have power if not check fuse if you do replace horn. some one will have to push on steeer wheel horn button while horn is tested.

The switch in steering wheel may be shot. Also check wiring to horn and you can also try connecting horn straight to horn.

Hi; I believe the cigar lighter is on that fuse and that was a problem on these vehicles.

If it's a 1500 then yes the 4l60E tranny is for you. If it's a 2500-3500 you'll need a 4l80E. The 80's are only used in trucks with a gvw or 7200 and greater.