Hummer H3T Automobile User Manual


 
An indicator light will flash while
shifting the transfer case. If the
transfer case cannot make a
requested shift, it will return to the
last chosen setting.
If the SERV 4WD message on the
Driver Information Center (DIC)
stays on, take the vehicle to
your dealer/retailer for service.
See Service 4WD message under
DIC Warnings and Messages
on page 3-37.
Shifting between Four-Wheel
High and Four-Wheel-High Lock
With the vehicle traveling less
than 75 mph (120 km/h), press and
release the Four-Wheel High or
Four-Wheel-High Lock button.
It may be necessary to drive
backwards while turning for a
distance of 25 feet (7.5 m) to get
the lock feature to disengage.
Shifting into Four-Wheel Low Lock
Notice: Shifting the transmission
into gear before the indicator
light stops flashing could cause
damage to the transfer case.
Always wait until the indicator
light stops flashing before putting
the transmission back in gear.
To shift into Four-Wheel-Low Lock,
the ignition must be in ON/RUN
and the vehicle must be stopped or
moving less than 3 mph (5 km/h)
with the transmission in N (Neutral).
The preferred method for shifting
into Four-Wheel Low is to have
the vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Press and release
the Four-Wheel-Low Lock button.
If the vehicle has a manual
transmission, the clutch pedal must
be pressed to the floor while you
press the Four-Wheel-Low Lock
button, or the shift will not be
completed. You must wait for the
Four-Wheel-Low Lock indicator
light to stop flashing and remain lit
before shifting the transmission
into gear.
It is normal for the vehicle to have
engagement noise and bump
when shifting between Four-Wheel
Low and Four-Wheel High ranges
or from Neutral.
If the Four-Wheel-Low Lock button
is pressed when the vehicle is
in gear and/or moving too fast, the
Four-Wheel-Low Lock indicator
light will flash for 15 seconds and
not complete the shift.
Features and Controls 2-25