Originally a 1SS did not have the steering wheel contols and usb.....but I think when they changed to the touchscreen, that all changed, it does appear from what I've been able to find.
Copied from a local dealer listing that has a new 2013 1ss.... Hope this helps.
•Audio system, 7" diagonal Color Touch screen display AM/FM stereo
•Audio system feature 6-speaker system
•SiriusXM Satellite Radio is standard on nearly all 2013 GM models. Enjoy a 3-month trial to the XM Premier package, with over 140 channels including commercial-free music, all your favorite sports, exclusive talk and entertainment. And now add premium channels to your trial at no cost. Welcome to the world of satellite radio. (If you subscribe after your trial period, subscriptions are continuous until you call SiriusXM to cancel. See SiriusXM Customer Agreement for complete terms at Welcome to the world of satellite radio - SiriusXM Radio
. Other fees and taxes will apply. All fees and programming subject to change.)
•Audio system feature, USB port, located in center console
•Chevrolet MyLink Touch includes Bluetooth streaming audio for music and select phones; Hands-Free smartphone integration
•Steering wheel controls, mounted audio controls
•Antenna, integral rear window
•Antenna, OnStar and SiriusXM Satellite Radio fin-type, Black, located on roof (Body-color when (WRS) RS Package is ordered.)