Just bought a 2014 Yukon Denali 82k miles on the clock. I'm the 3rd owner I think. Does anyone have a source for headphones for the entertainment system? I didn't get any with it. Also also if anyone has a source for interior trim pieces. The round plugs that hide the holes in the 2nd row arm rest pivot points are missing. Seller had small children. Looking forward to learning a lot on the forum.