2004 Tahoe battery light comes on/flickers - diagnosis/disable the light (unconventional repair #6)

READ THIS - A FANCY SCAN TOOL THAT CAN READ CLUSTER DATA IS THE ONLY WAY TO BE 100% SURE THAT IT IS AN INTERNAL CLUSTER FAULT. THIS WON'T FIX CHARGING SYSTEM PROBLEMS. TYPING IN CAPS BECAUSE IMPORTANT.
Back in 2017 I replaced the cluster in this 2004 Tahoe. Two years and some change later, the battery light started flickering at random. The volts gauge never went low nor did the cluster show a check gauges or check charging system message. I confirmed that the charging system was operating properly and that this was an internal cluster fault. Instead of spending a couple hundred bucks on a cluster (again), I disabled the battery light. While shown in this 2004 Tahoe, this problem has also been reported in many gm trucks/suvs from this era, including the Trailblazer/Envoy platform.
This repair has had no ill effects in the 9 months between the repair and now. The real now, not the alternate now which is 4 months ago because the timeline went off on a tangent.
I've searched high and low for where I got the reverse radio plug for bench testing the cluster, no luck as of today (8/14/2020). If/when I find it you won't be reading this. I'm pretty sure it was from Metra.
Thanks for your patience during these crazy times, the 50K subscriber special is coming. I'm suggesting that you look for things that look out of place for a reason.
Also, twitter is for updates and email is for questions. Please include year/make/model and a coherent question. If I missed your question it was not on purpose.