I was attempting to install the Silverado Spec kit in my 2015 2500HD Duramax and ended up ripping everything out. I got too frustrated with the lack of room from the back of Hid bulb and the headlight cover, lack of room for the ballast, and the lack of room for the igniters. Unfortunately, I am going to stick with stock. Luckily I only boogerd upon headlight cover by drilling a 7/8" hole in it. Patched up the hole with plastic weld and silicone.
Who know, I might get ambitious down the road and try again, but for know it's on permanent hiatus.
Oh well, $170 down the drain.