2006 GMC Yukon Owner's Manual - Page 108

To enter the program mode, do the following: 1. Begin with the ignition off. Then pull the turn signal/multifunction lever toward you and hold it there while you perform the next step. 2. Turn the key to RUN and LOCK twice. Then, with the key in LOCK, release the turn signal/multifunction lever. Once you do this, you will hear the lock switch lock and unlock, the horn will chirp twice, and a 30-second program timer will begin. 3. You are now ready to program the automatic door locks. Select one of the four programming options listed previously, and press the unlock side of the power door lock switch to cycle through the unlocking options. You will have 30 seconds to begin programming. If you exceed the 30-second limit, the locks will automatically lock and unlock and the horn will chirp twice to indicate that you have left the program mode. If this occurs, repeat the procedure beginning with Step 1 to re-enter the programming mode. You can exit the program mode any time by turning the ignition to RUN. The locks will automatically lock and unlock and the horn will chirp twice to indicate that you are leaving the program mode. If the lock/unlock switches are not pressed while in the programming mode, the current auto lock/unlock setting will not be modified. See your dealer for more information. 2-12 Rear Door Security Locks If your vehicle is equipped with this feature, you can lock the rear side doors so they cannot be opened from the inside by passengers. This feature is located on the inside edge of the rear doors. To use one of the locks do the following: 1. Open one of the rear doors. 2. To engage the rear door security locks, move the lever forward. 3. To disengage the lock, move the lever rearward. 4. Close the door. 5. Do the same thing to the other rear door.