2011 CTS
 
    You have one working remote and you want to add another.

1. Vehicle must be off.

2. Place the working remote(s) in the cupholder. Have the new remote with you.

3. Insert the key into the key lock cylinder located on the outside of drivers door.

4.Turn the key to the unlock position five times with in five seconds.

5. The (DIC) Driver Information Center displays Ready to Learn Electronic key #2, 3 or 4

6. Place the new remote into the transmitter pocket with the buttons facing the front
    of the vehicle. (The transmitter pocket is inside the center console between the
    driver and front passanger seats).

7. A beep sounds once the remote is programmed. The DIC displays Ready to Learn
    Electronoic Key #3 or 4, Or Maximum # Electronic Keys Learned.

8. Press the ignition control knob to exit programming mode.

9. Remove the remote from the transmitter pocket and press unlock to the remote two times.

10. To program additional remotes, repeat Steps 6 through 9.

      You have no working remotes. 

1. The vehicle must be off.

2. Place the new remote into the transmitter pocket with the buttons facing the front
    of the vehicle. (The transmitter pocket is inside the center console between the
    driver and front passanger seats).

3. Insert the key into the key lock cylinder located on the outside of drivers door.

4.Turn the key to the unlock position five times with in five seconds.

5. The (DIC) Driver Information Center displays Ready to Learn Keys.

6. Press the ignition switch in.

7. The DIC reads Learn Delay Active Wait XX Min and counts down to zero.

8. The DIC displays Press Start Control To Learn Keys again.

9. Press the ignition switch in again.

10. Repeat Steps 7, 8 and 9

11. The DIC reads Learn Delay Active Wait XX Min and counts down to zero.

12. A beep sounds and the DIC reads Ready To Learn Electronic Key # X.
       All reviously known remote programming has been erased.

13. A beep sounds once programming is complete. The DIC displays Ready To Learn
      Electronic Key #2

14. To program additional remotes, insert each transmitter in the pocket until a beep is
       heard and the DIC advances to the next electronic key number. Up to four remotes
       can be programmed. The DIC dislpays Maximum # Electronic Keys Learned and
       exits the programming mode.

15. Press the ignition control knob if programming is complete.

16. Press unlock on each newly programmed remote to complete the process.