I have to disconnect the battery to keep it from dying while sitting

I suspect that the ignition switch may still be the culprit if the chiming is due to a circuit being left or held open. so removing entirely the switch from the wiring harness would still leave the circuit open, right?

Ok here’s an update: I replaced the ignition switch component and am still getting the same issue. I removed the steel knee plate beneath the steering column and noticed that there was an aftermarket wire screwed to the steel bracket where the knee plate installs. Upon removing that wire, I noticed a desirable improvement: the radio clock now shuts off with vehicle shutdown(it previously stayed illuminated with the 2 indicators on the dash from the original post) and I no longer get a chime when I open the door. With all that being said, I left my truck sitting to see if maybe the ECM going to sleep would take care of shutting everything else off and not drain my battery, but no luck. The battery was drained enough to prevent starting within 3 hours. Any suggestions? I would really like to be able to fix this without having to route the negative battery cable into my cab to put a switch on it.