Do you have a color radio already/what trim?
But here is what you will need:
Touchscreen Head Unit (depends on what features you want):
Double-DIN Car Stereos with Touchscreen at Sonic Electronix
I recommend this (it has BT, manual and touchscreen controls, AppRadio, it is XM, NAV, and backup CAM capable):
Pioneer AVH-X1800S Double DIN In-Dash DVD/CD/AM/FM Car Stereo with 6.2" Touchscreen Display, Spotify & Pandora Control and SiriusXM Ready
You will need a dash kit:
Metra Online
Unfortunately, there is no cheap/standard wiring harness for aftermarket radios, so you will need this (it includes steering wheel button control, onstar, antenna adaptor for standard radio, and chime):
PAC RP5GM41 - Sonic Electronix
Or this (Rec. from Brian V)- You will need steering wheel control interface if you want to use the buttons and an antenna adaptor if you want to use standard AM/FM (Onstar, Chime):
http://www.amazon.com/Metra-GMOS-044-44-Way-Amp-Interface/dp/B005IFWABE
If you use the Metra one and want steering wheel button retention (Metra is generally regarded as more quality than PAC):
http://www.crutchfield.com/p_120ASWC1/Axxess-ASWC-1-Steering-Wheel-Control-Adapter.html?tp=3405
If you want to add nav/GPS:
Pioneer AVIC-U260 Add-On GPS Navigation System for Select 2010 or later Pioneer AVH Model Stereo Receivers
If you want to add XM/Sirius Radio (Subscription required still):
SIRIUS XM V300 SXV300v1 Next Gen Satellite Radio Vehicle Tuner
Your choice of backup camera:
Rearview Backup Cameras, Mounts and Accessories | Sonic Electronix
This is a package that includes a black dash kit, radio interface/harness with steering wheel control and chime retention:
Chevrolet Cruze Dash Kit | 2011 - 2012 - 2013 - 2014 | GM5202AB | by Scosche
Let me know if you have any questions, :th_salute:
Edit: This is not really plug and play, I mean it could be seen as that if you have installation experience, but you'll need to take apart the dash and connect a bunch of stuff, and run RCA to the backup camera (which needs to be mounted), mount the BT mic, among other things. However, compared to custom things or hard mechanical work, its pretty easy plug and play.