http://www.gmfleetorderguide.com/NASApp/domestiā€¦

Things to note:

-manual transmission V6s and V8s apparently DO NOT get cylinder deactivation; its only included/enabled when the automatics are ordered
-I4 and V6 can be had with SS-spec front brakes (in the form of the Heavy Duty Cooling and Brake Package, RPO code Y4Q)
-a 6-piston front brake kit is available as a dealer installed accessory, regardless of trim
-the LS trim (the base one for the 5th gen) is gone
-HIDs are standard on the SS, available on the LT
-no base curb weights listed as yet
-non-V8 cars do get an LSD, but itā€™s deleted if the automatic is ordered (in contrast, the Mustang comes standard with an LSD, regardless of trans choice)

Enjoy.