GMC Jimmy 2004 Owner's Manual page 76

All doors lock/None of the doors unlock: Press the
lock side of the power door lock switch once, and
then the unlock side three times.
No doors lock/None of the doors unlock: Press the
lock side of the power door lock switch twice. This turns
off the automatic lock feature. This is the factory setting.
For more information, see your dealer.
The following instructions detail how to program your
door locks. Choose one of the programming options
before entering the programming mode.
To enter the program mode, do the following:
1. Begin with the ignition in OFF. Then pull the turn
signal/multifunction lever all the way toward you
and hold it while you perform the next step.
2. Turn your key to RUN and OFF twice. Then, with
the key in OFF, release the turn signal/multifunction
lever. Once you do this, you will hear the lock
switch lock and unlock.
2-10
3. You are now ready to program the automatic door
locks. Select one of the previous four programming
options and follow the instructions. You will have
30 seconds to begin programming. If you exceed
the 30 second limit, the locks will automatically lock
and unlock to indicate you have left the program
mode. If this occurs, repeat the procedure beginning
with Step 1. You can exit the program mode any
time by turning the ignition to RUN. The locks
will automatically lock and unlock to indicate you
are leaving the program mode. If the lock/unlock
switches are not pressed while in the programming
mode, the auto lock/unlock setting will not be
modified.