I have a 1SS auto with sunroof and polished 20's, I can tell you right now, the 1SS does not come with the remote start feature. You can have the remote start feature added to your 1SS for 100.00 dollars via GMPARTSDIRECT.com.
Also doesn't come with rear parking assist.
*American Racing Headers (LT)
*Magnaflow cat-back competition exhaust
*K&N typhoon CAI
**Result**: 465rwhp/ 447rwtq. Satisfied.