Something I would like to do as well. I think he did this mod a couple years ago.
I have the thread bookmarked and one of these days plan on going back and doing it.
I miss this option, I had them on my Tahoe.
This was not an option in the US. My understanding is everything is plug and play except the power folding. There are two wires on the mirror that need to be wired to a switch and some relays to allow for the option to work.
I bought those power folding mirrors and drew up my own schematics a few years ago. I figured out my wiring and and how to make it all work with the factory switch, but never sat down and built the box to control it. One of the main reasons I haven't done it yet is because I need an extra set of stock mirrors with the heater and directions built in so that I can take them apart and not worry about ruining my stock set. You know, just in case I broke anything during the dismantling process. Also the Power folding mirror I bought don't have the directionals built into them either, so i'd need anther set to strip those parts out and custom fit into the new ones. Even used sets of mirrors on eBay are about $100, and i'm not interested in spending that kind of money for this feature. My design wouldn't make these automatic folding, but with a little thought i'm sure it could me done.
I read through the entire 7 pages of the trailvoy thread and noticed that Jetttstream had mentioned making a box to control these. I wonder what happened?
Anyone made any progress on this, have been looking into doing this for mine since my wife just got a new Acadia Denali this weekend and it's so nice to hit a button and not have to worry about pulling in and out of the garage.
You also have to use the folding mirror specific mirror control switch (the switch/knob on your door panel) as this is what 'parks' the mirrors. P/N 15123258 (light grey in color) I don't have the ebony color part number. Maybe one of the GM parts guys can find it.