So, after talking to my Chevy dealership, I found that even though there may be power to the auto-dimming connector, the components needed to make it work (wiring harness from overhead console to mirror, module, and programming) was cost prohibitive to say the least ($400 +). So the auto-dimming mirror option is out.
Even though the shopchevyparts.com manual dimming mirror was reasonably priced at $131, by the time you added tax & shipping it came to more than $150, which was really more than I wanted to spend.
I finally decided on ordering the Chamberlain 3 button combo mirror/garage door opener on Amazon. It was only about $110 and shipping was free because I have Prime. Here is the part I ordered:
Chamberlain Group TM210 ARQ Mirror with Garage Door Opener, One Size, Black
It seemed like the best option for me price-wise. I’ll let you know how it works out. Thank you all for your input and help.