This was his post....its for a Yukon sle so I'm not sure how it would work with a Tahoe. Good luck
I purchased new DL3 mirrors (23464428 drivers & 23464427 pass) with the power fold, turn signals, auto dimmers, heated and also the drivers door switch (23154702) with the fold button and amber led indicators in the mirror adjust buttons. I just installed these in my 2015 Yukon SLE and they were plug-n-play, no new harnesses, no bcm flash and everything works except for the puddle lights which I personally don't care about. I also don't know about the automatic dimming as I hardly ever drive at night (my Yukon has the inside rear view mirror auto dimmer so the DL3 probably does work). I wanted folding mirrors and the turn signals (they are amber). The mirrors come with no caps and you just pop off your old ones and snap them back on the new mirrors.
Here are the pin locations and wire colors, if your vehicle has the wire colors for the folding and turn signals they should work, but your mileage may vary!
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