GMC Hummer H3 2008 Owner's Handbook Manual page 205

Starting and Operating Instructions
7. Make sure the transfer case is
in neutral.
If the indicator light for the
neutral position is not lit, re-
peat the procedure starting at
step 3.
8. Turn the ignition to ACC.
9. Shift an automatic transmis-
sion into P (Park). Shift a
manual transmission into
1 (First Gear).
10. Turn the ignition to LOCK.
Release the park brake prior to
towing.
. . . 204
To shift out of the N (Neutral)
transfer case position:
1. Set the park brake and apply
the regular brake pedal.
2. Shift an automatic transmis-
sion into N (Neutral) or push
the clutch pedal if you have a
manual transmission.
Turn the ignition on but do
not start the engine.
3. Press the appropriate button
to shift into the desired trans-
fer case position.
When the transfer case is no
longer in neutral, the indicator
light for the neutral transfer
case position will turn off.
4. Release the park brake.
NOTICE
Do not shift the transmission
into gear until the transfer case
indicator light stops flashing.
Otherwise, the transfer case
could be damaged.
5. Start the engine and shift the
transmission into the desired
position.