Noticed this piece warping on my 2014 Sierra a few months back, 11.5k miles on the truck. Took it to the dealer yesterday and they are ordering an extension part #23340014. Time will tell if it is a fix or the same all thing with the new piece.
My Engine Cover showed up yesterday. I had just finished detailing the truck and slipped it on. Figure I'll leave the Cadi. emblem on for now. In the future maybe a BMW Roundel.
I have a picture of the rear door complete. It's been very sunny down here and piping does look white but rest assured it is a matted grey. Looks great with the brushed aluminum on the dash.
Just finished installing the Grey/Silver Piping to the 4 doors of my 2014 Sierra. If it helps, I found the material works best when cold. I put mine in the fridge for 5 minutes before installing. I used a 2 inch plastic putty knife to slide under the trim and worked the piping in next to it also a "v" cut into the piping makes the bend on the rear doors panels easier. The 4 doors took a total of 30 minutes.