Gonna need the TSB number for the 2013 or it is not a valid statement. Push them for the TSB.
2012 Convert 2SS/RS SW/IO LS3 - Build #1081
07/21/2011 - (3800) Order produced and vehicle is being prepared for shipping.
08/09/2011 - (4200) Shipped (vehicle is shipped to the dealer or interim point of delivery).
08/16/2011 - (5000) Vehicle has been delivered to dealer.
08/19/2011 - In my possession.