Hummer 2007 H3 - Manual (Page 93)

There are several ways to lock and unlock your
vehicle.
From the outside, use the key in the driver’s door
or use the remote keyless entry transmitter.
From the inside, use the manual lock levers or
power door lock switch.
Power Door Locks
The power door lock
switches are located on
the driver’s and the
front passenger’s
armrests.
Press L (lock) to lock all the doors at once.
To unlock all the doors, press U (unlock).
Driver’s side shown
93