I mention this only because I'm going through it right now on my '09 (with 80K miles): on the '12, see if they'll put it up in the air for you and check out the front lower control arm bushings (may as well check the upper control arm and sway bar bushings while you're at it). From what I've been able to gather across the forums, it's not uncommon for the V2's LCA bushings to deteriorate and crack, leading to the creaks and groans I have been hearing at low/parking lot speeds.
GM doesn't make the parts anymore, so I initially bought a set of LCAs pulled from a '14 coupe that looked great in the website pictures, but the bushings ended up being just as bad as the ones I'm trying to replace (am now replacing them with new units made by Moog). Good luck with whatever you decide.