Hummer 2005 H2 - Manual (Page 88)

Rear Door Security Locks
With this feature, you can lock the rear doors so they
cannot be opened from the inside.
This feature is located on
the inside edge of the rear
doors.
To use the security locks, do the following:
1. Open one of the rear doors.
2. Turn the lock
counterclockwise with
your ignition key.
3. Close the door.
4. Do the same to the other rear door.
If you want to open the rear door while the security lock
is engaged, unlock and open the door from the
outside.
To disengage the child security lock feature, turn the
lock clockwise with your ignition key.
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