Okay, so I finally purchased and installed the Auto Stop Start Eliminator from Amazon (under $20 including shipping and tax) for our 2019 Equinox. And just as others have reported, it works absolutely perfectly.
If you examine each of the connectors closely, you will find that there are very small position alignment keys, so that you will install each connector plug/socket correctly. And when installed correctly it does not set any codes or cause any other issues.
I absolutely could not resist “taking a peek inside” of the Amazon cable device, which looks like nothing more than a short cable with connectors to install at the hood latch. With a new blade in my Exacto knife, I very carefully slit the electrical tape around the “split loom tubing,” and removed it from the 3-wire assembly. Ah Ha!! There is a small resistor involved along with re-wiring on two of the three wires. After sketching out the schematic, and then studying the hood latch switch circuit in the GM factory service manual, I discovered the “engineering brilliance” of this device. And I now see how they made it work with setting any codes or causing any other issues. It would probably take me several pages to attempt to describe, but I will just say that it involves tricking the “resistance ladder” of the hood latch circuit. I would LOVE to know if anyone knows who the “inventor” of this device. It is Absolute brilliant.