Clucero,
Yes it will work fine. I ran 285 65 18 terra grapplers on my 2014 and now I run 275 70 18 BFG ATs on my 2015. The 285 is a little wider but is only about 32.5 inches tall while the 275 is 33.2 inches tall. Both fit fine under a 2.25 pro comp level with no rubbing or trimming. I personally like the look at the 275 better and I saw minimal mpg drop but, that's mostly due to the BFG being lighter than the nitto.
Is this the part # for a 2014 1500
Bilstein #24-238304
The notes say it is up to 1.8" of lift, is that correct?
http://www.suspensionconnection.com/24-238304-silverado-5100.html
Thanks for the help