In that case, it would probably be a good idea to disconnect the battery before doing all of that.
The ECU will most likely need to re-learn anyway, so there is nothing to lose by doing it.
The longest I have ever had mine disconnected was about 48 hours and when it was reconnected it took a few start-warmup-drive cycles to smooth out, but it did so eventually.
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Gen6 Camaro LT (my daily driver), Cruze ECO (grocery getter), Chevy SS Pickup (wife's daily driver), Honda Shadow, Honda CBX
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