The dreaded "AutoDim - Homelink" discussion; with a TEMPERATURE twist

[BGSnow]

Me;
2019 Chevy Silverado, LT (New Body), 4WD, Crew Cab, 1500

I've found and read most of the content on here about the lack of AutoDim, and the Rear View Mirror Options thread is a great resource, especially the post by @Semedar in August of 2019 with pictures.

So to solve my problem of NO AUTODIM, NO HOMELINK, I think I am going to replace the mirror with an AutoDim with integrated HomeLink (Like the Gentex 453). 
I have read, and hope that the HomeLink is integrated into the mirror, and I only need to connect the mirror to the 10pin power harness in the overhead.

Now I LIKE the idea of using a Mirror that has a Compass and Temperature built in as well.  I know I HAVE an ambient sensor on the Truck, since the temp shows up in the INFOTAINMENT CONSOLE when NOT USING Carlink.  
 

So I guess the question I have is "How to a get the ambient Temperature signal to the overhead Rearview?"  Which wire do I tap into to route the temp info to the mirror, and which wire does it connect to on the 10 pin/Mirror?
 

Edited March 19, 2025 by BGSnow