Since I bought my 2011 Tahoe LT with 100k last August, I've put 20k miles on it and done some small things with the help of threads on this forum:
(Cheated and had a shop replace ball joints, transmission cooler lines, coolant, rear diff fluid, transmission fluid flush and new tires when I bought it)
-Replaced worn out shocks and struts with Monroe (quickstruts), hated how it rode and re-did them with OEM ACDelco. Happy with the ride now.
-Front brakes and rotors.
-Added Crux bluetooth module.
-Moved USB port from inside console to cigarette lighter in dash.
-Installed backup camera with screen in rear view mirror (wanted to keep the OEM look).
-Changed the oil four times with Mobil 1 and ACDelco filter.
This is more work than I've done on any of my previous vehicles but I'm having fun and learning! Going to do the plugs and wires next.