I am fairly certain that the hoods are completely different. You'd probably be better off grabbing another stock Yukon hood and do custom work on that to add the vent (whether the OE HD truck vent or an aftermarket).
Picked up one of the last few 2014 Silverados in Arkansas in May of 2015. Blue topaz metallic! One of my favorite blues GM has come up with. Pics range from day one to current. The truck came with the 5.3L L83, 3.42 gears, 6 speed auto, and a locking diff (2wd truck). I have swapped out all of the speakers, added external amplification, and a sub. All of the components are Rockford Fosgate pieces. Headlight bulbs swapped for 8000k 35 watt HIDs. I tried Opt7 LEDs for a while, but they wouldn't last more than a month. Got pretty tired of trying them so I went back to my tried and true HIDs. 20" OEM Texas Edition wheels, polished. Added the custom center caps (I did the blue bowtie overlay). 275/55/20 Pirelli Scorpion STR tires. I have logo overlays on front and back (matched to wheel bowties). Bakflip HD bed cover. AVS Aeroskin hood protector Planning on adding an aftermarket grille soon.