4WD HUMMER H2 2007 Owners Manual

Indicator lights in the buttons show which mode you
are in. The indicator lights will come on briey when
you turn on the ignition and one will stay on. If the
lights do not come on, you should take your vehicle
to your dealer for service. An indicator light will ash
while shifting the transfer case. It will remain on
when the shift is complete. If for some reason the
transfer case cannot make a requested shift, it will
return to the last chosen setting.
If the SERVICE 4WD message stays on, you
should take your vehicle to your dealer for service.
See “Service 4WD message” underDriver
Information Center (DIC) on page 222.
Shifting between Four-Wheel High and
Four-Wheel-High Lock
With the vehicle traveling less than 40 mph
(64 km/h), press and release the Four-Wheel High
or Four-Wheel-Low Lock button. The indicator
light will ash while shifting. It will remain on when
the shift is complete.
It may be necessary to drive backwards for a
short distance of 25 feet (7.5 m) to get the lock
feature to disengage.
Shifting into Four-Wheel-Low Lock
To shift into Four-Wheel-Low Lock, the ignition
must be in RUN and the vehicle must be stopped or
moving less than 3 mph (5 km/h) with the
transmission in NEUTRAL (N). The preferred
method for shifting into Four-Wheel Low is to have
your vehicle moving 1 to 2 mph (1.6 to 3.2 km/h).
Press and release the Four-Wheel-Low Lock
button. You must wait for the Four-Wheel-Low Lock
indicator light to stop ashing and remain lit before
shifting your transmission in gear.
Notice:Shifting the transmission into gear
before the indicator light stops ashing could
cause damage to the transfer case. Always
wait until the indicator light stops ashing
before putting the transmission back in gear.
It is normal for your vehicle to have engagement
noise and bump when shifting between
Four-Wheel Low and Four-Wheel High or
Four-Wheel-High Lock ranges or from NEUTRAL
with the engine running.
130

SERVICE 4WD (Full-Time
Four-Wheel Drive)
This message displays if a problem occurs with
the Full-Time Four-Wheel Drive system.
If this message appears, stop as soon as possible
and turn off the vehicle. Restart the vehicle and
check for the message on the DIC display. If
the message is still displayed, or appears again
when you begin driving, there is a problem with the
Full-Time Four-Wheel Drive system. See your
dealer for service. Press any of the DIC buttons,
or the trip stem, to acknowledge this message and
clear it from the DIC display.
SERVICE AIR BAG
This message displays if there is a problem with
the airbag system. Have your dealer inspect
the system for problems. Press any of the DIC
buttons, or the trip stem, to acknowledge this
message and clear it from the DIC display. See
Airbag Readiness Light on page 207and
Airbag System on page 77for more information.
SERVICE AIR SUSPENSION
This message displays if a problem occurs with
the suspension system. If this message appears,
stop as soon as possible and turn off the
vehicle. Restart the vehicle and check for the
message on the DIC display. If the message is still
displayed, or appears again when you begin
driving, there is a problem with the air suspension
system. See your dealer for service.
SERVICE BRAKE SYSTEM
This message displays if a problem occurs with
the brake system. If this message appears, stop as
soon as possible and turn off the vehicle. Restart
the vehicle and check for the message on the
DIC display. If the message is still displayed, or
appears again when you begin driving, there
is a problem with the brake system. See your
dealer for service. Press any of the DIC buttons,
or the trip stem, to acknowledge this message and
clear it from the DIC display.
231

Fuses Usage
RR Wiper Rear Window Wiper Switch
SEO ACCYSpecial Equipment Option
Accessory
WS WPR Windshield Wipers
TBC ACCYTruck Body Controller
Accessory
IGN 3 Rear Heated Seats Module
Fuses Usage
4WDFour-Wheel Drive Switch, Air
Suspension Switch/Module
HTR A/C Not Used
LOCKPower Door Lock Relay
(Lock Function)
HVAC 1Inside Rearview Mirror,
Climate Control System
L DOORDriver’s Door Harness
Connection
CRUISE Cruise Control
UNLOCKPower Door Lock Relay
(Unlock Function)
RR FOG LP Not Used
BRAKE Brake Switch
DRIVER UNLOCKPower Door Lock Relay
(Driver’s Door Unlock
Function)
IGN 0Brake Transmission Shift
Interlock, Powertrain Control
Module, Transmission
TBC IGN 0 Truck Body Controller
VEH CHMSLVehicle and Trailer High
Mounted Stoplamp
LT TRLR ST/TRN Left Turn Signal/Stop Trailer
505