Do you have the GMC app on your phone? You can access the vehicle status, and at the bottom is "vehicle updates" and "view install history". Clicking on each update will give a short description, but only sometimes will that description actually explain what the update was supposed to do.
https://www.ebay.com/itm/273708931907
https://www.ebay.com/itm/175658218729?hash=item28e60bb4e9:g:5WEAAOSwwwtkGHgR&amdata=enc%3AAQAIAAAA8AtDcQY6yWqUqV2wMYgTI%2FdjEo5xN5kAEFXbAhGq9qgWsXshptT0kTUwdFehoDz341mVvAK419RG5uotR5MX6Ul8taQcp2HiVZ%2FQpwC89YiL6n0h7zqNUns97LyA8PriUVtHS2REaMtBiHsoKc0fStr2XjDBU5DVa13uL1AQpeWGuOHHu0JIJX2u7tQC%2FjYQJk8V0EeSCQ%2Bd5JI0p7USStvUa5SUcoTdBdc8MY1CzpT3BFfNNrtk4vhQoNwxrtUInI%2BE7sM2wSapmqphnThzfMuF4vbYk7O4XMQyhq9oyBvaRHxryILfQzFjLFlma6dSBA%3D%3D|tkp%3ABk9SR6q8mqj1YQ
No specs, but the actual nuts/bolts. If it helps.
I could be wrong, but I’m not sure you can adapt that camera to the rear view mirror. It’s a different connector, unless that camera comes out easily. And you can mount the other one in it’s place.
You usually need to add wiring to bring new features to the mirror, that were not present on your truck from the factory, like turn signals or spot lights. Not sure how you go about it with your brand of mirror though. Boost Auto sends full kits with wiring harness' and instructions.
Changing the led bulb to strips was a great idea.
I ended up trading in my 2017 Silverado that I did this to, and getting a 2023 Sierra. Which I added the rear camera mirror to as well, but it was all basically plug and play, much easier.
Thanks, but this info does not apply to 2022 and up, refreshed trucks. The new 13" widescreen infotainment somehow has fewer apps that the last trucks did.