What about the relay "Clicker"? Usually there's a turn-signal device under the dash that makes the clicking noise and often relays or times the blinking duration and frequency.
Have you tried pulling this? Instead of the fuse, it may just get rid of turn signals and keep the brakes.
Some models (older Civics for sure) have a relay/clicker for the 4-way flashers and one for the turn signals. Not sure if GM used this -- it could allow the use of signals if the redundancy was built-in...
Just an idea. Good luck getting that fixed...
RH77
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